1. Is there power running to your HVAC? You don’t hear sounds or flames? If not, then a. Ensure the switch attached to the furnace or nearby is in the ON position b. If the switch is on, check the breakers
Is your HVAC filter dirty? All filters need to get changed every 3-6 months. Dirty filters are the most common cause of HVAC issues. They are designed to protect the blower motor and evaporator coil, problems can cascade quickly if they are not replaced/cleaned frequently. To replace it a. Locate the filter. It will be in one of 3 locations: 1) the filter rack, 2) furnace cabinet or 3) in the return (vent) in the wall. See these pictures. Sometimes you might need a screwdriver to remove the cover or grill.
Is your thermostat programmed correctly? a. HVAC systems can malfunction because of thermostat settings. Make sure that the setting is correct and try turning the unit off and on again. There is a switch where you can manually turn it on and off
Is it just simply too hot? a. HVACs are only designed to change the temperature by no more than 20 degrees i.e. Is your thermostat turning on? If not, then 1. Pop off the front cover (just pull) and you should be able to replace it with a few AA batteries. b. Avoid running it 24 hours a day.
Do you see any leaks or standing water around the furnace? Some HVACs have a catch pan which if full of water would automatically cut the power if there is a float switch present. If you see a leak, try the following: a. Identify if it is coming from the coil or the condensation drain line. If you are not sure, place a blue paper towel underneath to help you find the leak (especially if it is a slow drip) b. If the drain line is clogged, pull it out. Sometimes it’s glued in which would definitely require a certified HVAC tech. Give the drain line a hard tug and if it’s not glued in it should pop out. Clean out the gunk or blockage by scraping it out with a screwdriver or even better a shop-vac.
Make sure the condensation pump isn’t knocked over. It needs to be in its original home and set level
Is the freon line cold? This is the larger copper pipe that enters the furnace cabinet near the evaporator coil a. It should feel like the inside of a refrigerator. If it is not cold, you will need a vendor to come out and fix the freon line or refill freon.
If your furnace isn’t working a. Look at the pilot light (the little screen). If the flames aren’t on, it typically means you don’t have gas. Check the other gas appliances in the house to determine whether or not to call the utility company.
