Category Archives: HVAC how to

HVAC or Heating Ventilation and Air conditioning has been with us for some time now from gas furnaces to cooling the air in our homes. The problem as with anything modern is it cost money when things break. This site is here to help everyone from the at home do-it-yourself person to the beginning HVAC technicians. With articles about troubleshooting HVAC problems.

Cost to Replace a Furnace Motherboard Control Board

If your furnace needs a new control board the average cost for an HVAC technician to install it is $400-$700 dollars. If you are a home DIY type of person furnace control boards can be bought online for $50-$250 dollars depending on the furnace. Doing it yourself is very tempting so let’s look at a… Read More »

How To Furnace Propane Natural Gas Conversion

Converting a furnace to propane from natural gas or vice versa is a straight forward simple process but great care has to be taken because of the possible danger if done wrong. Converting natural gas to propane or propane to natural gas is the same processes by installing new orifices. It involves changing out the… Read More »

Test and Replace the Fan Limit Switch on a Furnace

What is a Fan Limit Switch? A furnace has two switches called a fan limit switch and a high limit switch, these switches can be separate or in one package called a combination switch. High limit switch A high limit control switch will turn off the gas to a furnace if the temperature becomes too… Read More »

Gas Furnace Components and Parts Explained

A gas furnace can be broken down to its individual parts. Below is the main basic components for almost any gas furnace. Gas Furnace Components and Parts Explained Heat Exchanger When gas burns it gives off toxic fumes including carbon monoxide which is dangerous when breathed in. To keep the toxic gases separate from the… Read More »

Gas Furnace Sequence of Operation

There are different types of furnaces and furnace manufacture but below is the most common steps for a furnace to go through to start. While most furnaces will follow the below sequences there may be variations in models and manufacturers. Gas Furnace Sequence of Operation The thermostat reaches a set temperature and sends a signal… Read More »

Outside Condensing Fan Motor Does Not Shut Off

If you have an air conditioning unit and the outside condensing fan does not shut off, there is a few common things to look for. 3 Most Common Reasons Condensing Fan Motor Does Not Shut Off Thermostat Thermostat wiring Contactor While there are other things that can cause the same problem such as a bad… Read More »

Where To Buy R22 Refrigerant

R22 is being phased out in favor of more environmental friendly refrigerant types such as R134a. Since 1995 no new R22 refrigerant can be imported or created under the Montreal Protocol. R22 refrigerant can still be bought since it can be recycled from existing sources. When an HVAC service technicians turns in bottles of old… Read More »