You wake up in the middle of the night shivering cold. Throwing the blankets aside you rush to the thermostat only to find the set temperature is 70 but your house is now below 60! The
furnace is either not running or blowing cold air.
But before you go call an HVAC company and spend hundreds of dollars for emergency hours fees, how about taking a minute to figure out what might be wrong with the furnace?
Here’s a little article I wrote today about some furnace diagnostics. It may help you know if the HVAC person who comes to your house actually knows what he is doing. this can save you a lot of time and money.