HVAC Questions? Ask an HVAC Expert for Answers ASAP
Is this a battery operated thermostat? Turn fan to on position to see if it runs. Russ
yes - we are trying that
it doesn't appear to be working.
If you did not turn power off to unbit you may have blown a fuse. What is make and model number of inside unit.. Russ
the air conditioner unit?? It is an Amana RCE36C2A.
My husband is checking it outside.
Is this a gas furnace inside. Russ
We have an Amana Gas Furnace GUVA/GCVA inside and the airconditioner is outside. He could not tell where to check for a blown fuse.
Open the lower panel on furnace. You will see a furnace igniter board. Om board is a 3 or 5 amp auto type fuse. Check to see if it is blown. Russ
ok, we will check and get back with you.
I will be out for 30 minutes. Russ
We have to leave for a short time so we will check back with you. Thanks
there was a fuse (purple) in upper left corner of board. The metal wire on the fuse seems to be intact. we have taken it out and put it back in. It sparked when he put it back in.
Your fuse is ok. Make sure the jumper between R and RC is connected. When you have front off thermostat take a small wire and jumper between R and G to see if fan runs. Russ
ok we will try it but wont be home for about an hour will check back
OK, we tried putting the wire between R & G. Fan does not run.
Go to furnace and open panel. On board you will see R Y G W C terminals where wire is connected. Take a small wire and jumper from R to G and see if fan comes on. You will see a door switch that must be pushed in for fan to work. Do you have a voltmeter. Russ
do I take the jumper between R & G off of the thermostat before I do this?
We will try this tomorrow morning and get back to you. Everything was working just fine until we switched thermostats. Really didn't think it would be complicated. Frustrating.
I will be on at 6:00 AM CST. The thermostat change is simple. standard color code. Might be better to do it fresh in morning.
To reopen our issue from last night, our 2 other thermostats are in the off position, the fuse in the furnace is good, and wiring in the thermostat is still G=Green, W=White, Y=Yellow, R=Red with the jumper to RC. We have removed the R to G jumper on the thermostat. We do have a voltmeter.
Is this where we need to be to do the test on the front of the furnace?
Just fyi, when we set the thermostat on this unit the display says that the system is on, but the unit itself outside is just not working.
Check between R and G on therm ostat to see if you have 24 volts. Russ
on the board, these the designations of the wire, y, b/c, g, r, w1, w2 and they all have wires going to them. they are wired as follows: yellow & orange wires to Y, White wire toB/C, Green to G, Blue to R, another White to W1, and a black to W2. The door switch is pushed in. We are checking the voltage on the thermostat now.
you only have Green White Red and Yellow at thermostat. Russ
Yes, we have tried the voltmeter and we are not getting any power if it is working correctly. We have tried DC at the 50 mark, (actually almost all settings on the voltmeter) and we are not getting anything. When checking a socket in the kitchen on AC it is working.
Because the thermostat is battery operated, it seems to be working correctly, but we don't seem to be getting power through the wires.
FYI, we have done the steps on the thermostat itself. We have not yet tried jumping the R to G on the panel upstairs. To be clear on the panel upstairs we are to jump between the letters R & G despite the color of the wires. Correct?
Yes G is the fan terminal on strip. Check voltage on terminal strip of furnace between R and B/C. See if you have 24 volts AC. Russ
we have the volmeter set at the 50 AC setting and jumped the correct terminals and the door switch is in and we get nothing. Our other unit works just fine though???
our other thermostats are in the off position just in case that would make any difference.
Do you have light on board. Russ
The board you can not get voltage on at terminals R and B/C. Check fuse agian. Russ
when i push the door switch flat a red light flashes on but goes off immediately. There is a green flashing light next to the fuse but that is all. We are getting no reading on the voltmeter on the panel. we tried the jumping on the panel with the door switch in both positions and nothing. we put new batteries in the voltmeter just in case and still nothing.
Have you rechecked fuse. Russ
OK, I'm an idiot. I told my husband wrong. Between R and B/C we have 24 volts.
Jump from R to G now and see if the fan works. Russ
in the panel correct?
Yes panel. What color wires are on on R G W Y at panel. Russ
at the g= green, r=blue, y=orange-yellow(2 wires), w1 is white, w2 is black.
Connect the wires on thermostat to match the wires on furnace panel. Russ
the fan works when he jumps G & R on the panel.
Can you tell which wires go to thermostat from terminal board. Russ
on the thermostat we only have 4 wires. we have g=green, y=yellow, w=white, and Red to R & RC with a factory provided jump between the two. Where should we have voltage (between which terminals) on the thermostat?
Whatever wires are connected at the furnace board connec to same terminals on thermostat regardless of color. I have to leave for an hour but will check back. Russ
it says in our manual to remove the jumper if you have a two transformer system but I don't know if we do. We do have two separate units.
are you replacing the other technician? I don't know how to do that. Do we need to run the red to the "C" position now. We tried that earlier but it didn't work. Also do I need to remove the factory provided jumper between the R&RC?
Well, we don't really know how many transformers we have but we do have a C terminal. We have no spare wires. we only have 4 wires.
and the Red we currently have attached to R&RC with the jumper between them.
How far have you got so far on thermostat. Russ
no where. Same place we were when we talked to you last. Cant get the thermostat wired correctly. The wiring upstairs on the panel do not match what is on the thermostat.
After I had time to research 8900. You have a Comfort Control Center. You have to replace with same thermostat or a Honeywell IAQ system. The thermostat you have will not work. Russ