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The EH mode is locked on the Thermostat on carrier heat pump

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Sound like power is going to the E H wire or could be touching or bad thermostat..! Disconnect wires and backtrack!

Posted on Aug 27, 2008

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Posted on Jan 02, 2017

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Where the a/c temp. should show, the letters"EH" appear. Heat pump is wqorking good but can't adjust the a/c part


My guess is that the EH stands for electric heat which is a mode that the thermostat is in. Change your mode to AC if you want it in air conditioning mode.

Feb 26, 2013 | Bryant T6-PRH EDGE Thermidistat Thermostat

1 Answer

What is a E4 code mean


Error Code:
E1 Loss of communication between the Single Zone LCD thermostat and the mod-ule board. LCD will cycle between E1 and the previous mode setting. System
will shut down.
E2 Open circuit or out of range Indoor Temperature Sensor. Heating and cooling
operation will be locked out. Fan operation can continue to operate.
E3 Shorted Indoor Temperature Sensor. Heating and cooling operation will be
locked out. Fan operation can continue to operate.
E4 Open circuit or out of range Outdoor Temperature Sensor (select models). Heat
Pump operation will be locked out. Air Conditioner, Fan and Furnace operation
can continue to operate.
E5 Open circuit or out of range Freeze Sensor. Air conditioner mode of operation
will be locked out. Furnace, heat strip, heat pump and fan mode of operation can
continue to operate but displays the last temperature set-poi

Dec 18, 2012 | Dometic 3313192.000 White Single Zone LCD...

2 Answers

Carrier 38CKC042300. oUTSIDE UNIT FAN WAS TURNING REAL SLOW. ac UNIT IS OFF BUT FAN TO OUTSIDE UNIT IS STILL TURNING. sHOULD NOT BE TURNING AT ALL WITH AC UNIT OFF


The outside fan may run if the unit is in defrost mode this is normal for most heat pumps it is there way of trying to keep the outside unit from staying iced over so the next time the unit runs it will have air flow through the coil and the ice will not be there to prevent air flow.

Jan 12, 2010 | Carrier 38CKC042 Air Conditioner

1 Answer

The thermostat says EH where it should have the cool temp. it will not run the air


that is emergency heat they may be a wiring problem or bad thermostat

May 26, 2009 | Carrier Heating & Cooling

1 Answer

My outdoor heat will not operate. It is a Carrier 38YRA042330, with a Carrier Thermidistat thermostat and a Carrier Air Handler 40FFKB005300. I have an H5 error code on the thermostat will I put it in...


you need to go oside and look for a red reset button on the unit. you tripped the high ressure switch when you let your filter get that dirty. go check on this and when your done if it still is not working then ask me more.

Jan 25, 2009 | Carrier Heating & Cooling

8 Answers

Totaline Thermostat


Hi, My totaline thermostat says EH on it and will only heat. No AC. any suggestions. Previously my AC repairman came out and added Freon into the unit. But did not fix it totally either.

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Oct 26, 2007 | Computers & Internet

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