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I have a Rheem 90 plus imperial furnace which is blowing cold

Resolved Question:

I have a Rheem 90 plus imperial furnace which is blowing cold air. We had no heat or air conditioning. I replaced the thermostat with a new digital one. Now we have air conditioning but the furnace still blows cold. Could there be some sort of rest switch for the furnace or does a pilot light need to be lit?

Submitted: 1 year ago.
Category: HVAC
Expert:  HVAC Guru replied 1 year ago.


HVAC Guru :

Hello

HVAC Guru :

Hello are you here?

HVAC Guru :

I have to get going soon, but try twisting the red and white wires at the thermostat together. The heat should come on. If it does then there is an issue with the thermostat. if it does not then there is an issue with the furnace itself. I will be back on tomorrow.

Customer :

Were would I find the reset switches on a rheem 90 plus imperial furnace?
Guy XXXXXX

HVAC Guru :

There is not a reset button. What you need to do is remove the panel to the furnace and see what code is blinking on the board. Then check the panel, there is a code list on it to tell you what has gone wrong.

HVAC Guru :

If you get me the code I can assist you from there.

HVAC Guru :

I will be offline now, be back in 8hrs or so

HVAC Guru, HVAC TECH
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