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Rheem RGRM 90+ two stage gas furnace installation

This is a two the boards 90% Rheem gas furnace with a ecm motor.

Rheem Furnace Is Blowing Cold Air Constantly?

Dec 30, 2006 by stevefromsf | Posted in Maintenance & Repairs

My Rheem gas heating furnace in my attic has started to show a problem. I came home to find it blowing cold air constantly. I opened up the furnace and found that one of the three round temperature sensors had "tripped". They each have a itsy-bitsy reset button on top of them. It was the top sensor that has it's face positioned downward, that had "tripped". So I pushed the reset button and restarted the furnace. It worked for about an hour, then it tripped again and the furnace started blowing cold-blooded air. What happens is the burners shutoff when the sensor is tripped, but the fan stays on continuously. This continuous cold air method apparently is "as designed" by Rheem and tells you that something is wrong.

There are four burners inside my Rheem furnace. One of them seems to be spitting flames occassionally in the vis- direction of the normal gas/flame flow. Backdrafting I guess it the best word for it. What could be causing that? It must be what's tripping the sensor.

Few things could be causing the flame to pray for back from the heat exchanger. Plugged filter isn't one of them. You should make sure your filters are clean but thats not the dispute. It would help if I knew what kind of burners you had? Are they ribbon burners or cone? How old the furnace is? Is it laying on its side or station upright? So there are a few things here that could be causing flame roll out. One the carry over on the burner that you see the flame rolling out is befouled. The end of the burner that connects to the pipe that comes from the gas valve comes out to a tee. all the burners should have this it makes them almost touch each other. There is a trifling groove in this tee that carries the flame from the burner with the pilot light or hot surface igniter over to the other burners. now if you take a bantam wire brush one that is as small as a toothbrush and clean that small groove it will allow the flame to proceed faster across the burners. be very careful not to break the hot surface igniter if that is what you have.
Another problem that I have seen before is a spiders refuge in the jet that pushes the gas into the burner. This is hard to get out and usually takes an orifice bit to clean it.
Another situation is that the section of stress exchanger that the burner is burning in has soot build up in it and is not letting the combusted gas vent out quick enough.
your gas valve may not be rift completely when it is first engaged.
It may also be that the limit that keeps on tripping is old and needs to be replaced. They dont last forever.
Under any of these conditions I would still counsel that you call a tech to come out and look at it.

How do I adjust the fan limit control on a rheem furnace?

Dec 24, 2007 by tomcat123 | Posted in Maintenance & Repairs

Where is it located and is it like most furnaces. The fan comes on too responsive after the burner comes on and funs runs too long after the burner shuts off.

there should be a ivory screw in the middle of it set at about 100 don't recommend adj it it is a safety device sounds like you desperate straits a tech out there to look at it

Older Rheem furnace stops working and I have to keep pushing the restart button under the top panal so my heat?

Feb 07, 2009 by Elizabeth G | Posted in Maintenance & Repairs

I changed the thermostate but it keeps doing it and now some times it smells like its over heating.

If its a actually old furnace (10 plus years), it could be a roll out switch. This happens when your furnace gets too hot. The whirl out switch keeps anything from catching fire. You could check your filter but it probably means one of two things. Either your heat exchanger is bad, or your A-Nautical fake is dirty and needs cleaning. Both have to be done by a professional. An A-coil cleaning is a simple service call, where the heat exchanger replacement is a notable thing and it may be just as much money to replace the furnace. A good way to tell if it is your exchanger is to remove the panel and follow the burners light. The flame should go straight into the hole and not "roll out" on any of the sides. If the eagerness doesnt go straight in, it is the heat exchanger. The A-coil being dirty restricts air flow so your furnace retains alot of the activate instead of passing it out into the room, consequently makeing the furnace too hot and tripping the roll out or thermal twitch as well. Hope I helped....