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I HoneyWell Heat Pump Thermostat and would like to upgrade to a digital. Can I use a standard digital thermostat? or do i need a specific heat pump thermostat?

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Honeywell 8000 is a great digital thermostat that works very well with a heat pump

Posted on Nov 30, 2008

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Why does my American Standard heat pump compressor and condenser fan run when I have the thermostat set to emergency heat?


It's possible the "brain" thinks it can still supply some heat. Other wise there is a wiring problem or thermostat switch problem. Installed recently? Never used emergency heat before? What is your emergency heat type, gas or electric? Are you sure they are working. If not the "brain" senses and uses the only source available: heat pump. Thermostat? probably Honeywell? If so call Mfg customer service. Warranty on thermostat or heat pump? If so call customer service. Call your installer.

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How do I replace an old White Rodgers thermostat with new honeywell TH5220


The Orange wire for the reversing valve and used with a Heat Pump
If you have a heat pump, then yes. If you have a gas furnace then no. If you have a HP and the reversing valve is not connected, then you might just be using the emergency electric heat strips. :-o

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RTH3100C thermostat for an older Lennox heat pump


well the wire on x will go to e thr r is the red wire goes to r the wire on f willgo to g the y will go to y now the rest you'll have to verfy at air handler o will go to reversing valve common wire will go to c the electric heat will go to aux

Feb 06, 2014 | Honeywell RTH3100C - Digital Heat Pump...

1 Answer

Installed a RTH2310B to replace an older model honeywell. All wires do not match. only 3 do r, w1, and g do and o and e do not. what should i do?


The Honeywell RTH2310B is a standard thermostat and is not compatible with a heat pump system. The terminals O and E are for a heat pump system. I am assuming that the terminals you described that do not match are from the old thermostat. What you will need to do is get a heat pump thermostat. Sometimes it can be hidden within a lot of other descriptions on the front of the box, but it will say heat pump and either 2 heat/1 cool or 2 heat/2cool. You should just need the 2 heat/1 cool heat pump thermostat. Hope this helps.

Aug 17, 2010 | Heating & Cooling

1 Answer

I installed a Honeywell TH5220d 1029 thermostat on a American Standard AC/Heat pump and the install and setup went fine. It cooles for about and hour and quit. I found the 5 amp fuse at the furnace...


Red wire to R on thermostat red on furnace and red on heat pump Same with white except w1 on thermostat. Blue to common on thermostat common of furnace (probably brown but will be marked) and blue to common on heat pump. yellow to Y on thermostat and straight to heat pump. Orange to O on thermostat and straight to heat pump. If wired correctly with no shorts fuse problem should be solved. commonly people leave enough wire exposed inside the t-stat for wires to short together. This will blow the fuse. Hope this helps. I understand the frustration.

Jun 27, 2010 | Heating & Cooling

1 Answer

I am renting a house which has a Trane heat pump


If it is a heat pump it may not have enough oomph.

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2 Answers

Changed out a Honeywell Thermostat with an Aprilaire Thermostat


The smell is usually dust on the wires for electric resistance heat.The thermostat shouldnt have anything to do with it.

Nov 19, 2008 | Heating & Cooling

3 Answers

Hunter 44100A programmable thermostat


Yes you will need the orange (o) wire for the reversing valve in your heat pump. T-stat color code is red (r) for 24v power from transformer. Blue (x or c) is the common or the other 24v power from transformer and this will power your programmable t-stat. Orange is for the reversing valve that will switch your heat pump from cooling and heating. Green (g) controls your inside blower. Yellow (y) brings on your outside unit. White is your backup heat.

Sep 28, 2008 | Heating & Cooling

2 Answers

My Honeywell thermostat T874R is showing the EM heat indicator light when I turned the AC on for the first time this season--Why? House is warm but not humid.


The T874R thermostat should be a heat pump thermostat. EM means emergency heat which you obviously are not using. That means that you just need to determine if your heat strip is on while you air conditioner is working. If so you may need to replace your thermostat or you heating relay or sequencer.

May 27, 2008 | Honeywell Heating & Cooling

1 Answer

Replace Carrier tstatccshp01 builders standard thermostat with Honeywell rth7500 series and wiring not matching Does O wire go to Aux..? fan working but no cool air.


No... Aux. is auxiliary heat strip. This is usually a white or black wire its up to the choice of the installers preferance. O or orange wire. is used to the reversing valve on a heat pump. If you do have a heat pump there is a programing section inside the Honeywell t-stat. which should say heat pump or straight cool, then another section that will ask if you want the reversing valve to energize in heat or cool. most Heat Pump brands energize in cool the exception is Rheem and Ruud they energize in heat.

May 17, 2008 | Honeywell Heating & Cooling

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