Real Estate Investor · Seattle, WA · Member since 2009 · 308 posts · 61 votes
On of my unit's Sears forced air furnace is blowing room temp air. It is about 7years old. I don't have model number at this time. I had tenants turn it off for awhile and back on.
I know nothing about furnaces (yet).
Any suggestions on how to troubleshoot before I call handyman?
Can anyone post pictures of thermostat so I know what to look for? How to reset?
If its gas, it should have two compartments. One with the burners and a second with the blower fan. The control board is usually in the blower section. There is often a small window, about the size of a quarter, to look into the blower. If you stick your eyeball right up to the window, you should see an LED. If its having problems, it will likely be flashing a code. A series of flashes, pause, flashes, pause, etc. There will be a table of the inside of one of the covers that will tell you the meaning of the code. That will give you a clue.
But, if you know nothing about furnaces, call a tech.
The thermostat is the box on the wall where you adjust the temp.
Most of what can go wrong with an electric furnace would be difficult for the average person to fix. Technicians have the tools to run the diagnostics that can identify what is causing the problem.
It is probably an issue with the element ( heat producer), my guess would be a bad relay (fuse) You will most likely need a tech tho not a big expensive repair - if thats what it is.
Let us know
Good luck , Chris