Alarm sound but heat comes out

[dave92029]

I have a Coleman DGAA077BDTA 77,000 BTU heater air conditioner. The Deluxe Blend Air II 7681-8171/b is sounding an alarm. The red light is flashing continuously.

I can switch off the alarm and the heater appears to work fine...BUT I don't know what is wrong.

The warning codes indicates that I have reversed polarity...Duh? Where ? What?

I have turned off all power to the unit. Turned it back on, and the error persists.

Is there an easy fix?

Thanks
Dave

[dave92029]

I just read your description of the furnace. Should have done that first. The important green light is constant. The Air Blend light is flashing red constantly. I have turned the power back on and turned off the Air Blend alarm.

How do I determine why the Air Blend alarm is going off and how to fix it. Thanks in advance.

[Robert]

Hi,


Here you go :

http://www.mobilehomerepair.com/hvac/Ar ... ndAir.html




Thanks,
Robert