As an HVAC tech, I get many calls on furnaces that do not work with a wide variety of problems. One of the top problems and preventable is a dirty air filter which can cause many furnace issues. A common issue is a dirty filter block the airflow into the furnace, which causes it to… Read More »
If your furnace needs a new control board, the average cost for an HVAC technician to install it is $400-$ 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 few… Read More »
If the high limit switch in your furnace keeps tripping, the main cause is a lack of airflow. When the air can not flow through the furnace, it heats up and trips the limits switch off. Why Does the High Limit Switch Shut Off the Furnace? The high limit switch is a safety feature, so… Read More »
Testing the furnace limit switch by bypassing it is common to see if it has gone bad. A furnace should only be run for a short while to test the switch. The furnace limit switch helps protect the heat exchanger from becoming too hot and cracking. If the heat exchanger cracks, it can let noxious… Read More »
Furnace thermostat wiring falls in the DIY category that a handy type person can hook up or fix. Of course, if in doubt, be sure to call a professional. When working with a thermostat, the cover can be snapped off to expose the wiring. Before doing any work on the thermostat and wiring, take a… Read More »
What is a Fan Limit Switch? A furnace has two switches 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 high.… Read More »
Some years are worse than others for allergies with this being a bad year for allergies at least for me. Locally where I live the dust and pollen in the air seem to be worse than usual making me sneeze constantly and a nose that won’t stop running. Besides allergy medication there is not much… Read More »
A furnace draft inducer vents toxic gasses that come from the burner. The inducer motor insures there is constant flow of air outside through a vent so no toxic gasses enter a home. A Draft Inducer pulls toxic gasses from a furnace and pushes them out a vent pipe. An Inducer should start up before… Read More »
A furnace blower motor can be replaced by a handy DIY homeowner, which can save money. Of course, if in-doubt, be sure to call a professional HVAC technician. A new motor and capacitor will need to be bought to replace the old unit. Most hardware stores will not carry a furnace motor, but a new… Read More »
Replacing a furnace filter is often not on the top of the to-do-list. It can be overlooked until the furnace is not working properly or the air becomes less clean. People with allergies are often the first to notice when a furnace filter has become dirty and needs replaced. And just as important a dirty… Read More »