Have Honeywell RTH7500 always use Aux Heat for Heat Pump
#1
01-09-10, 10:14 AM
Have Honeywell RTH7500 always use Aux Heat for Heat Pump
Is there a way with the Honeywell RTH7500 to have it always use Aux Heat for my York Heat Pump system? My heat pump outside is old and doesn't produce good heat anymore and when the system is within 2 degrees of the set temperature, it always blows cool air, eating up my electricity bill. When it is on Aux Heat, I get very warm air and it works well.
So the problem is that say it is 65 in my house, and I want it to be 70. When the tstat turns on, it goes into Aux Heat and gets to about 68 degrees, then turns off Aux Heat and stays in "Heat" mode. Then the system blows cool air and hovers around 67-68 degrees turning Aux Heat on and off a lot. It never gets to 70 unless I turn the tstat up higher, manually.
I know I have to replace my heat pump, but for now I just want to use my Air Blower's heat source to survive the winter.
So the problem is that say it is 65 in my house, and I want it to be 70. When the tstat turns on, it goes into Aux Heat and gets to about 68 degrees, then turns off Aux Heat and stays in "Heat" mode. Then the system blows cool air and hovers around 67-68 degrees turning Aux Heat on and off a lot. It never gets to 70 unless I turn the tstat up higher, manually.
I know I have to replace my heat pump, but for now I just want to use my Air Blower's heat source to survive the winter.
#2
01-09-10, 03:39 PM
Forum Topic Moderator
Use the mode button to select emergency heat if you only want the electric heat strips for heating.
#4
01-10-10, 09:43 AM
Originally Posted by Houston204
Use the mode button to select emergency heat if you only want the electric heat strips for heating.
In Em Heat mode, it will either be in "Heat On" or "Aux Heat On" mode depending on the difference in target temp to actual temp, similar to how regular heat mode works.
Can I rewire the tstat so that everytime the heat comes on it goes into "Aux Heat On" regardless of what the front panel says? It seems to be the only way I get warm air.
#5
01-10-10, 02:30 PM
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You could reprogram the stat to be heat only.
Here is the install guide.
http://customer.honeywell.com/techli.../69-2104ES.pdf
Here is the install guide.
http://customer.honeywell.com/techli.../69-2104ES.pdf
#6
01-10-10, 03:27 PM
Originally Posted by Jarredsdad
You could reprogram the stat to be heat only.
Here is the install guide.
http://customer.honeywell.com/techli.../69-2104ES.pdf
Here is the install guide.
http://customer.honeywell.com/techli.../69-2104ES.pdf
#8
01-10-10, 06:17 PM
Originally Posted by Houston204
Sounds like it only heats enough when the heatpump and electric heat strips are running.
#9
01-11-10, 03:56 PM
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Sounds like we need to rewire the stat or air handler to make this work.
Post the colors and terminals at the stat and air handler. There is more than on way to make a machine do what you want, whether it likes it or not.
Post the colors and terminals at the stat and air handler. There is more than on way to make a machine do what you want, whether it likes it or not.
#11
01-15-10, 06:58 AM
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If you are wanting extra heat for now you can move the Aux wire over to Y. Just be aware, your electric bill is going to jump up.
The aux heat will always come on when the hp is called for heat.
FYI, when comes summer, you must move the Aux wire back to to Aux, otherwise, the electric heat will come on when the A/C runs.
The aux heat will always come on when the hp is called for heat.
FYI, when comes summer, you must move the Aux wire back to to Aux, otherwise, the electric heat will come on when the A/C runs.
#12
01-15-10, 12:59 PM
Originally Posted by Jay11J
If you are wanting extra heat for now you can move the Aux wire over to Y. Just be aware, your electric bill is going to jump up.
The aux heat will always come on when the hp is called for heat.
FYI, when comes summer, you must move the Aux wire back to to Aux, otherwise, the electric heat will come on when the A/C runs.
The aux heat will always come on when the hp is called for heat.
FYI, when comes summer, you must move the Aux wire back to to Aux, otherwise, the electric heat will come on when the A/C runs.
#13
01-15-10, 01:49 PM
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I, at least, am under the impression that your heat pump is junk and you want to only run the heat strips for heat.
If this is true do as Jay said and move the aux wire to Y and remove and tape off Y.
If you are getting some heat with just the heat pump and need the strips to help reach temp move Aux wire to Y and leave Y in there.
If this is true do as Jay said and move the aux wire to Y and remove and tape off Y.
If you are getting some heat with just the heat pump and need the strips to help reach temp move Aux wire to Y and leave Y in there.
#14
01-15-10, 06:18 PM
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Originally Posted by tmar89
Well, if my Heat Pump blows cold air when its on Heat On mode and stay on constantly, cycling Aux Heat On and Heat On for hours, wouldn't that use more electricity than if I had the reliable strips heating up for a shorter time?
#15
01-16-10, 01:56 PM
Originally Posted by Jay11J
If it blows cold air, is the large line outside unit warm/hot? If not, it may be another issue.
