I have a Carrier Heat Pump 38YRA that stopped operating this morning. I checked my circuit breaker-no problem. I have replaced all 6 fuses on the service disconnect boxes; still not working. Is there anything else I can check as a homeowner before paying for an expensive service call?Thanks very muchJerry Mazza
Make : Carrier Heat Pump
Model : 38YRA
Checked circuit breaker
Does the indoor fan work if you put the fan to ON and the system to OFF?
No, the indoor fan does not work when set on fan only
take the cover off the thermostat and get a paperclip and touch one end to R and the other to G and see if the fan comes on
Should I assume R refers to the red wire and G to ground? (one of the other two wires is beige and one is yellow. Which is the ground?). I need a bit more explanation. Thanks
At the thermostat
R is for Hot and G is for the fan
24 volt circuit
Just want to test if the stat is the problem since you have checked all the fuses and breakers.
Can I send you a photo of the thermostat so you can tell me exactly where the points are to touch the paper clip?
Do you know how to do that?
yes, if you can give me your email address
Cannot do that. Site does not allow it. Upload the pictures to your computer then use the paperclip to attach them to this chat
It will show up like this one
Click paper clip, then click on the browse button of the image URL and then browse to the location on your computer
got them, give me a minute
You need to take those 2 flat head screws loose and that top portion will come off.
That will expose the wiring you need to test
You may want to kill power to the indoor unit first
Once you have the top off, turn the power back on and we can proceed
OK, the top is off, the power is back on
Do you see the R and the G terminals
Yes, and I tried the paper clip but it did not jump start the fan
So now you need a volt meter
Do you own 1
No, sorry, I don't
It could also be that you have a blown fuse inside the airhandler which is the indoor unit
You will need to open it up and look for the control board and it may have a 3 or 5 amp auto fuse in it.
Ok, I'll check that now
I'm attached a photo of the control panel.
Okay, you need to make sure you are getting high voltage to that airhandler
You can try to touch the R-G inside the airhandler and see if that brings on the fan.
My feeling is you have 0 power to the indoor unit which is supposed to provide 24 volts to the thermostat.
Without a meter hard to tell where the problem lies.
I tried R-G on the airhandler and the fan did not come on
Then it is a power issue. Try turning the breakers off and then back on. Without knowing if you have 240 volts getting to that airhandler, it is hard to continue
I did try turning the breakers on and off; that wasn't it.
I called a repair service who came to the house. Turns out it was a broken wire connection in the airhandler control panel.
Thanks for your help
6 years in the HVAC industry.