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Old 12-27-2020, 01:33 PM   #2
Mike1931
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Join Date: Feb 2017
Posts: 94
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Re: E1 fault on thermostat
Try removing power from thermostat and see if it doesn't re-set.


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