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-   -   Heat Pump Thermostat HELP!!! (http://www.diychatroom.com/f17/heat-pump-thermostat-help-89020/)

MichaelG 12-07-2010 07:53 PM

Heat Pump Thermostat HELP!! ******UPDATED*****
 
**********UPDATED***************

I recently replaced my Heat pumps thermostat and it doesn't seem to be calling for auxilliary heat at all. My house will not get above 55 degrees.

All electric setup here.

My wires and how they are suggested to hook up to the thermostat per the heat pump manual are as follows -

R - Red - 24v
G - Green - Fan
O - Orange - Heat 1st
w1- Brown - Heat 2nd
w2- White - Heat 3rd
Y - Yellow - Cool
C - Blue - Common

The new thermostat is a Hunter 44272

I understand everything but I am unsure about the W1 Brown wire.. I was told the White wire is the Aux heat but not sure about the W2 & W1 wires... on the old thermostat, the Brown was connected to E terminal.

I was suspect the thermostat went bad so I am changing it out. To me, the heat pump seems to be working fine when I inspected it - It just cant keep up with the 20 degree cold snap on it's own. For some reason my aux heat strips are not kicking in and I need to figure out why... Is it my wiring to the thermostat??

I now have it hooked up like this -

R - 24v
y - compressor contact
G - Fan relay
O - Cool relay / valve
W2 - Aux heat
C - Common

Brown - unhooked.

MichaelG 12-07-2010 08:03 PM

I wonder if there is something blown and the aux can't kick on because of that.?.?

hvactech126 12-07-2010 08:05 PM

try w1 with white and w2 with brown. depending on your air handler in may need a call for heat on white before brown in order to fire up, or you may have a problem with your backup heat and it may not be stat at all

beenthere 12-07-2010 08:34 PM

Was the aux heat working with your old thermostat?

Hixheat1 12-07-2010 08:56 PM

Quote:

Originally Posted by MichaelG
I recently replaced my Heat pumps thermostat and it doesn't seem to be calling for auxilliary heat at all. My house will not get above 55 degrees.

All electric setup here.

My wires and how they are suggested to hook up to the thermostat per the heat pump manual are as follows -

R - Red - 24v
G - Green - Fan
O - Orange - Heat 1st
w1- Brown - Heat 2nd
w2- White - Heat 3rd
Y - Yellow - Cool
C - Blue - Common

The new thermostat is a Hunter 44272

I understand everything but I am unsure about the W1 Brown wire.. I was told the White wire is the Aux heat but not sure about the W2 & W1 wires... on the old thermostat, the Brown was connected to E terminal.

I was suspect the thermostat went bad so I am changing it out. To me, the heat pump seems to be working fine when I inspected it - It just cant keep up with the 20 degree cold snap on it's own. For some reason my aux heat strips are not kicking in and I need to figure out why... Is it my wiring to the thermostat??

I now have it hooked up like this -

R - 24v
y - compressor contact
G - Fan relay
O - Cool relay / valve
W2 - Aux heat
C - Common

Brown - unhooked.

Jump w1 and w2 at stat go to furnace and remove brown wire jump w2 and e at furnace or aux if different at furnace send a reply

hvactech126 12-07-2010 09:21 PM

why would you do that hix? You are taking away a stage of heating. for comfort and energy conservation you would want them to be staged!

also you could be masking a problem of one of the banks of heat being inoperative.

MichaelG 12-08-2010 03:45 AM

Quote:

Originally Posted by beenthere (Post 547651)
Was the aux heat working with your old thermostat?

Either one or both banks seemed to have stopped working...The system would be running non stop and the house would only be around 62 degrees. I was told that my old Janitrol mercury stat might have crapped out and to replace it first to see if that was the issue. That is where I am at now.

MichaelG 12-08-2010 04:19 AM

Quote:

Originally Posted by hvactech126 (Post 547635)
try w1 with white and w2 with brown. depending on your air handler in may need a call for heat on white before brown in order to fire up, or you may have a problem with your backup heat and it may not be stat at all

Just tried this and it doesn't seem to do anything. I have attached pictures so you can see what I am looking at. On the new stat it does not show w1 or w2 as an option for heat pump hook up. It does however have it listed on the side for conventional.... Please see the attached images for more clarification.


OLD STAT
http://i268.photobucket.com/albums/j...b/IMG_1243.jpg

HEAT PUMP MANUAL
http://i268.photobucket.com/albums/j...b/IMG_0743.jpg

NEW STAT
http://i268.photobucket.com/albums/j...b/IMG_0742.jpg

NEW STAT MANUAL
http://i268.photobucket.com/albums/j...b/IMG_0744.jpg


Btw - someone should develop a wiring harness that is used throughout the HVAC industry that would be a standard quick disconnect. Someone please get all the controls and equipment manufacturers together and come to an agreement!!!! Problems like mine seem all to common on many levels within the wiring department for all different spectrums of the HVAC industry.....


Thanks for your help! If I can't get this figured out in the next few hours - I will be calling a service tech. It is a balmy 50 degrees in the house now...

beenthere 12-08-2010 04:21 AM

Ok. So this is not an issue of just a miswired thermostat then.

You probably have a bad sequencer in your air handler, and that is why the aux heat isn't working. Or, it could be that one or both of the strip heaters are broke.

Do you have a multimeter.

beenthere 12-08-2010 04:23 AM

Not all heating systems work the same to use a standard harness.

MichaelG 12-08-2010 05:04 AM

Quote:

Originally Posted by beenthere (Post 547782)
Ok. So this is not an issue of just a miswired thermostat then.

You probably have a bad sequencer in your air handler, and that is why the aux heat isn't working. Or, it could be that one or both of the strip heaters are broke.

Do you have a multimeter.

Yes I have a multimeter.

beenthere 12-08-2010 05:07 AM

Turn power off to air handler. And check if the heaters have an ohm readings. of roughly 12 ohms.

MichaelG 12-08-2010 07:20 AM

Funny - I am having a hard time locating the heat strips. Having never fooled around with HVAC before - Is there somewhere else I should look other than inside the unit? I have looked at the duct work as well to check for an inline duct heater and couldn't find anything. Starting to think this POS system doesn't have a secondary element.... I am calling a tech.

MichaelG 12-08-2010 08:20 AM

Okay - I found the heating element. It was on the side of the unit in an access panel I didn't bother to remove. It's attached to the side of the house fan. Looks like a mouse or two got in there and might of made a connection inside the heater kit. Could it of blown something here? What are these black things?

http://i268.photobucket.com/albums/j...b/IMG_0749.jpg

http://i268.photobucket.com/albums/j...b/IMG_0746.jpg

MichaelG 12-08-2010 08:29 AM

Are those transformers? Can I just swap it out?


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