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WHATIF...
You get a service reminder message
Service reminder messages -- check UV light, check hum pad, check filter -- tell
you that it’s time to change the UVC lamp in the evaporator coil box connected to
the furnace (when installed), humidifier pad (when installed), and furnace filter.
Make the indicated changes with the exception o f the UV lamp -- for important
safety reasons, ask your dealer to replace that.
You get a system error message
Here are the possible system error messages and what they mean:
E1 The system isn’t communicating properly. Call your heating and cooling
dealer for service.
---- The room air temperature sensor has failed. Call your heating and cooling
dealer for service.
or
The outdoor temperature sensor isn’t working. Call your heating and cooling
dealer for service.
E4 There’s an internal memory failure. Call your heating and cooling dealer for
service.
E5 The humidity sensor isn’t working. Call your heating and cooling dealer for
service.
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