Rheem Furnace Problem

[rdlagess]

My Rheem Furnace is 14 years old and is a high efficiency gas unit (I assume 80%). The problem is that when we set the programmable Tstat it comes on once. Then a motor in the furnace runs nonstop but the furnace heater will not come on again nor does the starter. When I shut it down and wait 10 seconds or so to restart, it runs properly. It may then run properly for 7 or 8 cycles then start to act up again. Can you tell me the cause?

Bob LaGesse

[lonestarheir]

Haven't you had problems with this unit for a while now? It sounds like you are having a problem with a relay or safety switch. Without more info on the unit, I would have a hard time telling you which.

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Brandon
- Have you changed your filter this month? -

[SSN596]

Even a 14 year old heater, especially if it was designated as a "hi-efficiency" unit, has a fairly complicated control board. You need someone knowledgeable enough to study the control diagram and logically test the possible causes.

[Fitter597]

Are you reseting it by turning the switch off at the furnace or by shutting the thermostat off and back on? And if you could supply a model number for the furnace which would be inside the top door, that would help alot.