A few neat tools to help you find problems!
This is how to do a bench on a residential refrigerator/freezer defrost timer.
DIY: Make your own Air Conditioner
When attempting to operate a gas furnace, the first step is to make sure the furnace is getting power, after which the gas supply should be checked through the gas valve.
1986 Furnace. I kept hearing a sound like a candle being blown out. Went under the house with the tech. 1st thought it was the Gas Valve, but voltage drop upon flame out indicated a bad flame sensor assembly. $200 repair
In A Hour.com
