[Bathroom Ventilation Fan Installation]

Both Mitsubishi and Panasonic make QUIET and powerful ceiling fans for bathrooms. Far superior to a wall fan or the off brands. 

[Water Pump]

Particle matter, such as blue PVC shavings or sand can cause trouble, even on a quality water pump. Crossy's observation I have experienced "It's possible that the non-return valve on your pump inlet is leaking and letting the pressure out that way ".  A non return valve can have the "gate open" by particle matter.  

[how to paint cinder blocks to last longer]

All good advice given. Those blocks are going to "suck up" the primer even if cleaned. You may heed the heed the advice on skim coat. It will pay off in savings of primer. 5 gallons of Nippon Flex Shield primer is about 2000 baht a bucket at Global House or Thaiwatsadu. That primer will cover 150 to 170 square meters of wall surface if it is rendered. It never hurts to fill in cracks on fences. Dulux Weathershield super primer is also a product I have bought and been very satisfied with. 

[Fix the fridge?]

In Buriram, the authorized warranty repair station for dozens of brands is YJ Electric. They DO come to your home to look at a fridge problem. I believe the OP should contact the manufacturer and see what repair facility is authorized for his city. Even the mainstream Chinese brands signs agreements with repair service centers in Thailand. Even Beko from Turkey has agreements with repair facilities. Samsung and LG generally have their own dedicated service centers. 

[Any easy way to paint a tiled house roof.]

The OP may want to look into the TOA 201 Roof Seal.  Homepro and other stores sell this in 5 gallon buckets. I have fond it to be more robust than the TOA roof paint.  It does come in Blue.  https://www.toagroup.com/en/product/product-details?url=ทีโอเอ-201-รูฟซีล

[Good Air Compressor brand names]

The Puma listed above may prove a disappointment for painting. It is a very LOUD model. A Puma with a Mitsubishi or Hitachi electric motor will not be under 5000 baht. It will be a much better long term purchase and will run at a reasonable sound level. TEST the air compressor in any store before you spend your money. Bring ear plugs for the Puma series shown above. 

[Interior Paint - colour charts]

Global House D.I.Y. store has cheap prices on good interior paints. Tons of folders.  GlobalHousePaint

 

[Solar panels for private homes]

The OP can walk into any Global House Store (when they open up again) and see a nice display on solar options both off grid and tie in. Easy to do the math. HomePro also has a display with prices of solar power options for a home in Thailand. There are half a dozen stores selling solar equipment in Buriram,  There are expats who design and install solar systems large and small in Buriram and Surin Province with actual customers. This blog shows a large solar system power a nice home in Surin Province. 

https://ecohousethailand.wordpress.com

 

[Get your electricity deposit back]

I have a 30/100 meter in my name. I'll go the PEA this week to see how to be the refund. The deposit is posted on the wall in most PEA offices. Smaller meter has a nominal deposit, and some meters the deposit is larger. 

[Where to buy Lawn Mower Blades ?]

The Troy Bilt Mustang Zero Turn Lawn mower is at least 130,000 baht less that the Toro Time cutter HD X5450 model with 137 cm Cutting deck in Thailand. Both are excellent zero turn lawn mowers given the limited selection of actual zero turn lawn mowers imported into Thailand by authorized importers. Limited models of genuine Castel Garden, Orec, Husqvarna riding lawn mowers are also imported into Thailand by authorized importers. In my experience some lawn mower importers are far superior in stock of spare parts for the models they import than some other importers of lawn mowers. 

[Where to buy Lawn Mower Blades ?]

The OP has many choices in Thailand to purchase lawn mower blades. Genuine Honda blades and lawn mower parts are readily available in Thailand. Genuine Troy Bilt Zero Turn Lawn Mower Blades I have seen get mailed from Buriram. 

[Water pump pulsing]

Depending on where you buy a Hitachi Water pump, you can get excellent intelligent after the sales service from both Hitachi distributors in Thailand. I recently spoke with a Toyobo Hitachi technical representative in English in Buriram regarding Hitachi water pumps.   http://www.toyobothailand.com/?lang=en&id=

[Agricultural Fairs And Shows]

I am interested in attending any agricultural fairs in Korat, Khon Kaen, Surin or Buriram in December 2016 or early 2017. If any forum members have dates or links to fairs please feel free to post them. My wife seems interested in better uses for her land than growing rice or sugar cane. Thank you. 

[Quik Fire Gas Bbq'S]

I bought a stainless steel gas BBQ from Doc for our home in Isaan. Excellent value. Designed and built to a much higher specification than the 'disposable" units sold at some big box stores in Thailand. Doc helped me with the order and it arrived at the post office with minimal set up required. I try to avoid Chinese items whenever possible in Thailand.