I have a Comfortmaker RPJ model G-011 400050 - 08M -PD that when the power is turned on to the unit, the blower fan runs continuously and the outside AC unit runs continuously no matter what mode is set at the thermostat. (A/C or Heat). I just moved into the place and the thermostat looks like it was replaced. The current thermostat is a RiteTemp. When selected to Heat mode, the furnace ignites and heats, but the outside AC unit is also running.

Sounds like there may be a wire touching at the t-stat or the control board is going bad

Thanks for the info, I checked the wiring and can't see any touching, the indoor unit could use a good cleaning though, looks like it hasn't been cleaned in quite some time. Also, I forgot to mention in the original post that when switching from Auto to On with the stat, that the motor makes a change in sound but doesn't change speeds or do anything different other than continue to run.

Turn the power off snap the t-stat off the wall then turn the power back on and see if it comes on.

The stat doesn't pop off, I had to disconnect all wires from stat. When I did that, and turned power back on, the fan came on.

What about the outdoor unit is it running? Sounds like you may have a bad fan relay

Yes, the outside unit is running as well.

Well next it sounds like you will need to take the t-stat wire loose form the control board in the bottom door of your furnace and see if the fan and ac still ccme on.

Should I remove all three wires that go to the t-stat?

Yes, you can try that

Disconnected wires for t-stat, blower did not come on, but outdoor unit did come on.

Removed wires to t-stat, blower did not come on, but outdoor unit did come on.

Does the outdoor un it only go off when the breaker is shut off to it? Or does it go off when you turn the furnace off?

It only goes off when you shut it off at the breaker box.

OK sounds like the contactor is stuck on the ac unit. That would be why the ac does not shut off now we need to find out if the fan will shut off. Is the ac the only thing messed up right now? Or will the indoor fan still not shut off either?

Right now the ac is the only thing that will run. I have all wires from t-stat still disconnected and the fan does not come on when power is restored to the furnace.

I will connect all wires back and connect the t-stat again and see what happens.

OK good if everything is working but the ac I can tell you how to check the contactor

Reconnected wires from t-stat back to panel on furnace unit, did not connect wires to t-stat, turned power back on to the furnace unit and blower fan comes on. Is this supposed to happen. A/C unit is still shut off at breaker box.

Maybe, some furnaces have a 1 min 30 sec blower on delay after statrt up. Does it go off or is it still running??

It is still running.

And no wires are touching each other up on the wall where you took your stat off are they? Also to make sure I am on the same page as you, when you took them off the control board the fan did not come on correct?

There are no wires touching at the t-stat, and correct when all wires were disconnected the fan did not come on when power was returned to the unit.

I did notice that possibly the A/C is wired to the Common connector on the panel, if that makes any difference.

Then it sound like you have some wires touching somewhere between the t-stat and the furnace, is there any where they might have got pinched? ( a tight place or a sharp bend) if nothing runs with the wires off the board then the board is working properly. So the red and the green wire must be touching somewhere. Do you have a ohm meter?

I can check obvious places for a possible cause. No I don't have an ohm meter.

Do you have extra wires in the wall or just the 4 you have hooked up?

I think I may have found a possible cause. Don't ask me why, but whoever lived here before wired the doorbell (the furnace unit area is adjacent to the front door wall) which I disconnected the wires that possibly go to the doorbell and when I did that the blower does not come on when power is returned to the unit.

Although, the issue with the outdoor A/C unit coming on when the breakers are reset is still there.

Wow that's odd, OK so how many wires do you have including the door bell wires?

OK well lets get the t-stat wired back up like it should be and make sure everything inside is normal, and then we can try to fix the outdoor.

I have 3 sets of wires going to the panel that only have a red and white wire in them, and one wire that has red, white, green and blue in it.

I have re-connected the t-stat wires and the blower is back to coming on again.

OK do you have a digital t-stat or a old mercury? You just need to wires to the outdoor unit. Red on y, and white on c

What you need to do is find out what set of wires you don't need.

It is not digital, but runs on batteries. Has temp slide selector and mode selectors on the side for cool, off, heat and Fan On and Auto.

There is a set of the red and white wires connected to panel... white on C and Red to the Blue wire to the T-stat, which is not connected to the panel.

How many wires up stairs at the stat?

4 wires at the stat... red, white, green and blue.

Lets make it so there are 4 wires at the stat and just 6 in the basement

Did you get rid of the third wire or did you hook it back up?

Don't have to go to the basement, furnace unit is off the living room.

Disconnected the 4th wire, still have 3 connected to the panel.

At the control board you should have 2 wires on yellow, 1 on c, 1 on g and 1 on w, 1 on r

I have a red and white on C, a white on W, a red on R and a green on G. None on Yellow.

Blue from the t-stat should be on y and the red from the outdoor unit.

What should be on C.

So the t-stat should be
r- red
y-blue
g-green
w-white

The control board should be

r-red to t-stat
y- blue from t-stat and red from outside
g- green from t-stat
w-white from stat
c- white from outdoor

OK, got them set up that way.

Give it a try

Returned power to unit, blower motor came on at high speed. Thermostat is set to OFF and AUTO.

Switched breaker to AC unit on and it is running. With the furnace unit shut down.

Who ever was there last really left you in a wiring mess. Turn the ac breaker on and see if we got that part fixed.

Silly question, but are you sure you don't Have the 2 reds backwards?

AC unit is still running without being requested to run.

If all is as it seems, then the two reds are connected correctly. But then again, it does seem like a wiring nightmare... lol. I have the AC and blower going to see if when the stat reaches set temp it cycles off. Crossing my fingers.

Well at this point, I would say you will either have to call a hvac tech to come check out the wiring, or get yourself a volt and ohm tester and we can go from there.

I may have to just have a hvac tech come out and check it out. I don't want to short anything out and end up with a bigger problem. Got to love these rehabs. I really appreciate all your help, hopefully it will make things less confusing for the hvac guy.

Please let me know what you find out after he is done.

Hello sir! Your problem is in the outside a/c unit. "relay coil" its stuck in a/c run mode. That is why every time you turn on the heat or ac from the thermostat it always running.( and sometimes during the winter months and even when the furnace isn't on that outside ac unit will come on ) i see that you have shut the ac off at the breaker box. You need to go out outside to the ac unit and go inside the back case remove the cover and change the relay coil. You can do it yourself or have a qualified technician do it for you. But rest assured that is your problem . You can call me at 313 978-3717 my name is dwayne alexander and my email is [email protected].

Hello sir! Your problem is in the outside a/c unit. "relay coil" its stuck in a/c run mode. That is why every time you turn on the heat or ac from the thermostat it always running.( and sometimes during the winter months and even when the furnace isn't on that outside ac unit will come on ) i see that you have shut the ac off at the breaker box. You need to go out outside to the ac unit and go inside the back case remove the cover and change the relay coil. You can do it yourself or have a qualified technician do it for you. But rest assured that is your problem . You can call me at 313 978-3717 my name is dwayne alexander and my email is [email protected].

Hello sir! Your problem is in the outside a/c unit. "relay coil" its stuck in a/c run mode. That is why every time you turn on the heat or ac from the thermostat it always running.( and sometimes during the winter months and even when the furnace isn't on that outside ac unit will come on ) i see that you have shut the ac off at the breaker box. You need to go out outside to the ac unit and go inside the back case remove the cover and change the relay coil. You can do it yourself or have a qualified technician do it for you. But rest assured that is your problem . You can call me at 313 978-3717 my name is dwayne alexander and my email is [email protected].