ThailandFoodExpert Posted March 29, 2021 Share Posted March 29, 2021 On 3/25/2021 at 11:04 AM, ExpatOilWorker said: Thanks for the Thomson tip. what did you fix there ? 1 Link to comment Share on other sites More sharing options...
ExpatOilWorker Posted March 29, 2021 Share Posted March 29, 2021 (edited) 2 hours ago, ThailandFoodExpert said: what did you fix there ? Well, just got my car back today and to be honest Thomson was a mixed experience. I had a light vibration in the rear drive shaft and that they did fix, but they recommended also changing the wishbone after I had left, so the bill added up beyond what was first agreed. I have a strange fault on the AC, basically it works fine if the cabin is cold, but the AC struggle if I have parked in the sun. At first they said they could 100% fix it, but at the end I got the feeling they also still don't know what the fault it. At the end they didn't charge anything for the AC and it is still faulty , so fair enough, but it would be nice to get it fixed. Edited March 29, 2021 by ExpatOilWorker 2 Link to comment Share on other sites More sharing options...
ThailandFoodExpert Posted March 29, 2021 Share Posted March 29, 2021 1 hour ago, ExpatOilWorker said: Well, just got my car back today and to be honest Thomson was a mixed experience. I had a light vibration in the rear drive shaft and that they did fix, but they recommended also changing the wishbone after I had left, so the bill added up beyond what was first agreed. I have a strange fault on the AC, basically it works fine if the cabin is cold, but the AC struggle if I have parked in the sun. At first they said they could 100% fix it, but at the end I got the feeling they also still don't know what the fault it. At the end they didn't charge anything for the AC and it is still faulty , so fair enough, but it would be nice to get it fixed. Thank you for report. What I do not like is that they are not even able to print an English receipt. It's so stupid when talking about technical parts / fix. 1 hour ago, ExpatOilWorker said: they recommended also changing the wishbone after I had left maybe because they are doing their job correctly ? have you checked anywhere else before, and can you post photos of the part that was changed ? did they give you the old part to confirm that it was changed ? 1 hour ago, ExpatOilWorker said: I have a strange fault on the AC, basically it works fine if the cabin is cold, but the AC struggle if I have parked in the sun. maybe they where thinking that the problem was gaz leak ? What else could it be ? anyway better not charge you for anything than charge for something not needed as most idiot Somchais would have done ? Did they confirm that your gaz level is correct ? thanks again. 1 Link to comment Share on other sites More sharing options...
ExpatOilWorker Posted March 29, 2021 Share Posted March 29, 2021 39 minutes ago, ThailandFoodExpert said: Thank you for report. What I do not like is that they are not even able to print an English receipt. It's so stupid when talking about technical parts / fix. maybe because they are doing their job correctly ? have you checked anywhere else before, and can you post photos of the part that was changed ? did they give you the old part to confirm that it was changed ? maybe they where thinking that the problem was gaz leak ? What else could it be ? anyway better not charge you for anything than charge for something not needed as most idiot Somchais would have done ? Did they confirm that your gaz level is correct ? thanks again. I am not faulting them for changing the wishbones, rear left + right, that was probably the right decision and a reasonable fair price. Yes, they gave me the old parts to keep. I don't have a gas leak as the AC compressor pressure is OK and it has been years since it was last refilled. Even a small leak would have drained it by now. It could be the expanded valve, but nobody seem to know for sure. 1 Link to comment Share on other sites More sharing options...
ExpatOilWorker Posted March 30, 2021 Share Posted March 30, 2021 The irony is that today I just happen to walk past a shop that is specialized in refurbishing wishbone and they can replace the ball-joint for 700 baht a piece. Well, live and learn! 2 Link to comment Share on other sites More sharing options...
canthai55 Posted March 30, 2021 Share Posted March 30, 2021 37 minutes ago, ExpatOilWorker said: The irony is that today I just happen to walk past a shop that is specialized in refurbishing wishbone and they can replace the ball-joint for 700 baht a piece. Well, live and learn! NEVER go to a dealer for consumables - they will ONLY use OEM parts. 1 1 Link to comment Share on other sites More sharing options...
WayWokeWhiteGuy Posted March 30, 2021 Share Posted March 30, 2021 (edited) The AC could be dirty fan, fan bearing, dirty filter, weak fan-motor. Does it blow hard? Edited March 30, 2021 by WayWokeWhiteGuy 1 Link to comment Share on other sites More sharing options...
ExpatOilWorker Posted March 30, 2021 Share Posted March 30, 2021 9 minutes ago, WayWokeWhiteGuy said: The AC could be dirty fan, fan bearing, dirty filter, weak fan-motor. Does it blow hard? Plenty of air coming through the wents and it is nice and cold if the car has been parked in the shade. Not so if I do a sun parking. I doubt it is the compressor and the electric fan is also running fine. It is also not a design fault, as the AC was nice and strong when the car was newer. It is most likely the expansion valve, but to replace it apparently require removal of the entire dashboard. Not something I want Somchai to do, as it could easily damage other parts. Link to comment Share on other sites More sharing options...
canthai55 Posted March 30, 2021 Share Posted March 30, 2021 If you in CNX take it to Amnuay Motor Air 1 Link to comment Share on other sites More sharing options...
stubuzz Posted March 30, 2021 Share Posted March 30, 2021 18 minutes ago, ExpatOilWorker said: Plenty of air coming through the wents and it is nice and cold if the car has been parked in the shade. Not so if I do a sun parking. I doubt it is the compressor and the electric fan is also running fine. It is also not a design fault, as the AC was nice and strong when the car was newer. It is most likely the expansion valve, but to replace it apparently require removal of the entire dashboard. Not something I want Somchai to do, as it could easily damage other parts. BQuik offer a flushing service. https://www.b-quik.com/en/product/air 1 Link to comment Share on other sites More sharing options...
ExpatOilWorker Posted March 30, 2021 Share Posted March 30, 2021 11 minutes ago, stubuzz said: BQuik offer a flushing service. https://www.b-quik.com/en/product/air Please correct me if I am wrong, but isn't flushing the system just a marketing gimmic for re-charging the AC with new/more gas? No diagnostic is done, so a defect expansion valve will not be detected. 1 Link to comment Share on other sites More sharing options...
stubuzz Posted March 30, 2021 Share Posted March 30, 2021 3 hours ago, ExpatOilWorker said: Please correct me if I am wrong, but isn't flushing the system just a marketing gimmic for re-charging the AC with new/more gas? No diagnostic is done, so a defect expansion valve will not be detected. No. Read the link below. https://m.sgcarmart.com/accessories/info.php?product=140898 Link to comment Share on other sites More sharing options...
ExpatOilWorker Posted March 30, 2021 Share Posted March 30, 2021 53 minutes ago, stubuzz said: No. Read the link below. https://m.sgcarmart.com/accessories/info.php?product=140898 The plot thickens. They had the below machine at Thomson Garage, which they proudly showed me told thay paid 300,000 baht for. It looks very similar to the flushing equipment in your link. So why didn't they use it? 2 Link to comment Share on other sites More sharing options...
stubuzz Posted March 30, 2021 Share Posted March 30, 2021 20 minutes ago, ExpatOilWorker said: It looks very similar to the flushing equipment in your link. So why didn't they use it? The flushing kit is an optional extra. https://www.ecotechnics.com/en/eck-1890-eck-1890-hfo/ 2 Link to comment Share on other sites More sharing options...
ExpatOilWorker Posted March 31, 2021 Share Posted March 31, 2021 11 hours ago, stubuzz said: The flushing kit is an optional extra. https://www.ecotechnics.com/en/eck-1890-eck-1890-hfo/ Could also be that they don't really know how to operate their fancy equipment. I am still not convinced flushing the AC system will do any good. 1 Link to comment Share on other sites More sharing options...
thepdru Posted March 31, 2021 Share Posted March 31, 2021 3 hours ago, ExpatOilWorker said: I am still not convinced flushing the AC system will do any good. It's not difficult to understand. It's explained everywhere and so logic. Air and debris can be in your system even if you have a small leak that you don't even know. 1 Link to comment Share on other sites More sharing options...
ExpatOilWorker Posted March 31, 2021 Share Posted March 31, 2021 I might have a mechanical sound AC after all and the problem lies elsewhere. Since I have 2 digital thermometers rigged up in the cabin, I decided to test in different points and Eureka, warm air is always coming out on the driver's floor side. This could point to faulty control flaps. Also the air temperature does not change when I disengage the recirculation function. The recirculation function is most likely not working and I am constantly taking in ambient air, which explain why the AC is struggling during warm and sunny days. This could be a relative easy DIY job. I might give it a try. I still don't understand what the purpose of the photo transistor is, but that will have to wait for now. Link to comment Share on other sites More sharing options...
mogandave Posted March 31, 2021 Share Posted March 31, 2021 7 hours ago, thepdru said: It's not difficult to understand. It's explained everywhere and so logic. Air and debris can be in your system even if you have a small leak that you don't even know. How do air and debris get into a closed system under pressure? I thing it can only get in when recharging or if completely empty. 1 Link to comment Share on other sites More sharing options...
mogandave Posted March 31, 2021 Share Posted March 31, 2021 1 hour ago, ExpatOilWorker said: I might have a mechanical sound AC after all and the problem lies elsewhere. Since I have 2 digital thermometers rigged up in the cabin, I decided to test in different points and Eureka, warm air is always coming out on the driver's floor side. This could point to faulty control flaps. Also the air temperature does not change when I disengage the recirculation function. The recirculation function is most likely not working and I am constantly taking in ambient air, which explain why the AC is struggling during warm and sunny days. This could be a relative easy DIY job. I might give it a try. I still don't understand what the purpose of the photo transistor is, but that will have to wait for now. Good work... 1 Link to comment Share on other sites More sharing options...
ExpatOilWorker Posted April 1, 2021 Share Posted April 1, 2021 Clearly something is amiss. 46.5 C at the floor and 4.5 C at the dashboard vents. I am playing around with the settings to get a better feeling of what could be wrong, before taking the darn thing apart. Link to comment Share on other sites More sharing options...
sncoem Posted April 1, 2021 Author Share Posted April 1, 2021 On 3/29/2021 at 2:46 PM, ThailandFoodExpert said: Hi, do you know any Pattaya shop / garage that has this equipment to test air con system ? Thank you. Most do not have any equipment and detect leaks by experience. It's so funny how these "experts" are ridiculous and do not even know that if you detect leaks without a gas sniffer or dye, you are an idiot. 1 1 Link to comment Share on other sites More sharing options...
sncoem Posted April 1, 2021 Author Share Posted April 1, 2021 On 3/30/2021 at 3:38 PM, ExpatOilWorker said: Please correct me if I am wrong, but isn't flushing the system just a marketing gimmic for re-charging the AC with new/more gas? No diagnostic is done, so a defect expansion valve will not be detected. Flushing is the only way to inject proper gas amount. Nobody knows how much they put when they refill because they didn't know how much gas was in the system before refill. 1 Link to comment Share on other sites More sharing options...
sncoem Posted April 1, 2021 Author Share Posted April 1, 2021 17 hours ago, mogandave said: How do air and debris get into a closed system under pressure? I thing it can only get in when recharging or if completely empty. When you have a leak or you refill anything can go inside. 1 Link to comment Share on other sites More sharing options...
Ralf001 Posted April 1, 2021 Share Posted April 1, 2021 1 hour ago, sncoem said: Most do not have any equipment and detect leaks by experience. It's so funny how these "experts" are ridiculous and do not even know that if you detect leaks without a gas sniffer or dye, you are an idiot. Did you have a bad experience with the shop I used. Link to comment Share on other sites More sharing options...
Yellowtail Posted April 1, 2021 Share Posted April 1, 2021 2 hours ago, sncoem said: Flushing is the only way to inject proper gas amount. Nobody knows how much they put when they refill because they didn't know how much gas was in the system before refill. You may be confusing flushing with evacuating. 1 Link to comment Share on other sites More sharing options...
Yellowtail Posted April 1, 2021 Share Posted April 1, 2021 (edited) 2 hours ago, sncoem said: When you have a leak or you refill anything can go inside. It hat not what he said? So an empty beer bottle could go inside? Edited April 1, 2021 by Yellowtail Link to comment Share on other sites More sharing options...
sncoem Posted April 1, 2021 Author Share Posted April 1, 2021 (edited) Another thread was closed so I post here again what was explained and requested https://forum.thaivisa.com/topic/1212217-car-ac-aircon-air-conditioning-gas-refill-shops-how-do-they-know-that-they-put-enough-i-think-they-just-dont-know-but-maybe-you-know/?tab=comments#comment-16359648 Car AC aircon air conditioning gas refill shops, how do they know that they put enough ? I think they just don't know ! But maybe you know ? Cheers, My car AC has a leak and until I fix it I have o refill few times a year. What is funny is that the only real way to know how much gas there is in the system, is to empty it (flush), and then put the amount required. When they just refill I wonder how they know what is the total gas in the system. For example my car should have 630g, but what they see when they refill is only low and high pressure, not the total gas in the car. Please check the pictures before and after refill, do you think that they refilled enough ? Or it's clearly impossible to know ? And what if they put too much ? I am wondering if any place is actually able to totally empty/flush the gas and refill it with required amount ? But how can they know that they inject 630g even when they gauge does not show any quantity ? Please tell me what I do not understand ? Greetings ! I found this: https://www.rechargeac.com/how-to/ac-system-pressure-chart R-134a TEMPERATURE PRESSURE CHART(Tabla de Temperaturas y Lecturas) Ambient temp is the outside atmospheric temperature. Ambient Temperature °F / °C (Temperatura Ambiental) Low-Pressure Gauge (Puerto de Servicio del Lado de Baja Presion) High-Pressure Gauge (Puerto de Servicio del Lado de Lado de Alta Presion) 65°F (18°C) 25-35 psi / 172-241 kPa 135-155 psi / 931-1069 kPa 70°F (21°C) 35-40 psi / 241-276 kPa 145-160 psi / 1000-1103 kPa 75°F (24°C) 35-40 psi / 241-310 kPa 150-170 psi / 1034-1172 kPa 80°F (27°C) 40-50 psi / 276-345 kPa 175-210 psi / 1207-1448 kPa 85°F (29°C) 45-55 psi / 310-379 kPa 225-250 psi / 1551-1724 kPa 90°F (32°C) 45-55 psi / 310-379 kPa 250-270 psi / 1724-1862 kPa 95°F (35°C) 50-55 psi / 345-379 kPa 275-300 psi / 1896-2068 kPa 100°F (38°C) 50-55 psi / 345-379 kPa 315-325 psi / 2172-2241 kPa 105°F (41°C) 50-55 psi / 345-379 kPa 330-335 psi / 2275-2310 kPa 110°F (43°C) 50-55 psi / 345-379 kPa 340-345 psi / 2344-2379 kPa INTERPRETING PRESSURE READINGS Low-Pressure Gauge High-Pressure Gauge Action Required IN RANGE IN RANGE A/C is working properly. LOW LOW Add Refrigerant. LOW HIGH Need service, possible blockage of the expansion valve or orifice tube. HIGH LOW Needs service, possibly faulty compressor. HIGH HIGH System is overcharged. Slowly remove refrigerant. Venting is illegal in USA. I wish that people do not comment to tell me to fix the leak blablabla... as you can guess I already know it ! The title of this post is: Car AC aircon air conditioning gas refill shops, how do they know that they put enough ? I think they just don't know ! But maybe you know ? And this is the only thing that I ask you. If you don't know, please just do not reply. Edited April 1, 2021 by sncoem 1 Link to comment Share on other sites More sharing options...
WayWokeWhiteGuy Posted April 1, 2021 Share Posted April 1, 2021 You sound like you already know everything you ever will. The gages tell you when it full. Try reading the instructions Link to comment Share on other sites More sharing options...
scoupeo Posted April 1, 2021 Share Posted April 1, 2021 20 minutes ago, sncoem said: Another thread was closed so I post here again what was explained and requested https://forum.thaivisa.com/topic/1212217-car-ac-aircon-air-conditioning-gas-refill-shops-how-do-they-know-that-they-put-enough-i-think-they-just-dont-know-but-maybe-you-know/?tab=comments#comment-16359648 Car AC aircon air conditioning gas refill shops, how do they know that they put enough ? I think they just don't know ! But maybe you know ? Cheers, My car AC has a leak and until I fix it I have o refill few times a year. What is funny is that the only real way to know how much gas there is in the system, is to empty it (flush), and then put the amount required. When they just refill I wonder how they know what is the total gas in the system. For example my car should have 630g, but what they see when they refill is only low and high pressure, not the total gas in the car. Please check the pictures before and after refill, do you think that they refilled enough ? Or it's clearly impossible to know ? And what if they put too much ? I am wondering if any place is actually able to totally empty/flush the gas and refill it with required amount ? But how can they know that they inject 630g even when they gauge does not show any quantity ? Please tell me what I do not understand ? Greetings ! I found this: https://www.rechargeac.com/how-to/ac-system-pressure-chart R-134a TEMPERATURE PRESSURE CHART(Tabla de Temperaturas y Lecturas) Ambient temp is the outside atmospheric temperature. Ambient Temperature °F / °C (Temperatura Ambiental) Low-Pressure Gauge (Puerto de Servicio del Lado de Baja Presion) High-Pressure Gauge (Puerto de Servicio del Lado de Lado de Alta Presion) 65°F (18°C) 25-35 psi / 172-241 kPa 135-155 psi / 931-1069 kPa 70°F (21°C) 35-40 psi / 241-276 kPa 145-160 psi / 1000-1103 kPa 75°F (24°C) 35-40 psi / 241-310 kPa 150-170 psi / 1034-1172 kPa 80°F (27°C) 40-50 psi / 276-345 kPa 175-210 psi / 1207-1448 kPa 85°F (29°C) 45-55 psi / 310-379 kPa 225-250 psi / 1551-1724 kPa 90°F (32°C) 45-55 psi / 310-379 kPa 250-270 psi / 1724-1862 kPa 95°F (35°C) 50-55 psi / 345-379 kPa 275-300 psi / 1896-2068 kPa 100°F (38°C) 50-55 psi / 345-379 kPa 315-325 psi / 2172-2241 kPa 105°F (41°C) 50-55 psi / 345-379 kPa 330-335 psi / 2275-2310 kPa 110°F (43°C) 50-55 psi / 345-379 kPa 340-345 psi / 2344-2379 kPa INTERPRETING PRESSURE READINGS Low-Pressure Gauge High-Pressure Gauge Action Required IN RANGE IN RANGE A/C is working properly. LOW LOW Add Refrigerant. LOW HIGH Need service, possible blockage of the expansion valve or orifice tube. HIGH LOW Needs service, possibly faulty compressor. HIGH HIGH System is overcharged. Slowly remove refrigerant. Venting is illegal in USA. I wish that people do not comment to tell me to fix the leak blablabla... as you can guess I already know it ! The title of this post is: Car AC aircon air conditioning gas refill shops, how do they know that they put enough ? I think they just don't know ! But maybe you know ? And this is the only thing that I ask you. If you don't know, please just do not reply. I am having the same problem and I have found a post on the forum, to change your evaporator you will have to do this 2 Link to comment Share on other sites More sharing options...
stubuzz Posted April 1, 2021 Share Posted April 1, 2021 14 minutes ago, sncoem said: What is funny is that the only real way to know how much gas there is in the system, is to empty it (flush), and then put the amount required. Emptying is vacuuming, not flushing. Flushing uses Freon or a flushing liquid to wash the internals before a vacuum is pulled and gas is added. 20 minutes ago, sncoem said: Car AC aircon air conditioning gas refill shops, how do they know that they put enough ? I think they just don't know ! But maybe you know ? The amount of gas/Freon in a system can be estimated from the reading on the gauges. If your readings are within specs, your gas level is acceptable. Link to comment Share on other sites More sharing options...
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