HVAC Questions? Ask an HVAC Expert for Answers ASAP
Hi, I'm Tim and I'm an HVAC expert here to assist you with your questions. Please provide all information I request as it makes it more difficult to troubleshoot something when I'm not there onsite. Essentially, you become my eyes and ears. Thanks for the opportunity to help. At the end of our dialog, you will have a chance to rate my service, but please wait until we are finished and you're satisfied you have all the information you need.
Based on the symptoms you are describing, it sounds like you may not have gotten the thermostat firmly seated on the back part (called the subbase). It's also possible that you might have blown a fuse.
It would be a fuse at the furnace or air handler (not sure which you have). The fuse would be on the circuit board
Do you have a voltmeter? This would be the simplest way to check the furnace (or air handler)
Yes, that's possible. In fact thermostat issues constitute a good part of my service calls.
Let's try this: pull the thermostat off the wall, and doublecheck that your batteries are in correctly. Then reattach firmly to the back part
Yeah, make sure they are going the right way because being in wrong could potentially damage the thermostat
Yeah, I wouldn't recommend that
It depends. On some, a solid light means the control is bad. I'd need a control model number. Or make and full model of furnace
Turn the fan switch to on instead of auto. Does blower start?
OK. The next step would be to check voltage at the thermostat wires to see if you have 24 volts
That will be your coil. That model doesn't help me
Nope, inside unit
But not the coil ABOVE your furnace, rather the furnace itself
You will most likely have to take a door off
Let's try something first...
Turn furnace power off. Take thermostat off the wall. Find the red wire on R and the green wire on G. Take them off the screw terminals and twist together
Then turn power back on
Tell me if blower runs
OK, that would tend to tell me you have a bad thermostat
Yes, The fact that blower runs tells me you have power and it is probably a thermostat issue.
No problem. Be sure to label wires before taking off old thermostat. Thanks for using JA and please don't forget to rate my service. Post back with any additional ????'s