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How can I adjust the time a rheem furnace Classic quiet 80runs?

My heater over runs making the house uncomfortable befor it shut off.

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Adjust the heat anticipator setting to match the amp draw on the 24 volt heating circuit

Posted on Apr 15, 2012

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Turn the thermostat down. If it's a mercury bulb stat, they are very inacurate and have a wide temp swing.

You could also just replace the thermostat with a good honeywell or white rodgers digital stat and get more accuracy, comfort and efficiency out of your unit.

Posted on Dec 27, 2008

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1 Answer

Rheem Classic 90 FURNACE. Blower motor constantly running, even if t-stat is removed. Led blinks four times. PS closed, is the code. Not a psycho problem, I think it is the voltage transformer.


An LED that blinks four times followed by a two-second pause is signaling the pressure switch is closed when it should be open. The switch itself might be stuck, or the tubing that attaches the switch to the furnace's draft inducer might be blocked

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I have a rheem classic quiet 80 . furnace starts up but the igniter will not kick in to start the flame


This problem can be one of two things:

1) Bad igniter.

2) Control board not sending 120 volts to igniter.

You will need a multimeter to verify if the igniter is receiving 120 volts.

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Rheem classic 80 fan motor on furnace hums will not turn on


Have you checked the capacitor? Try spinning the blower wheel by hand, if this gets the motor going you have a bad capacitor. If not, the motor will need to be replaced.

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1 Answer

Hi- how do i add refrigerant to a rheem classic super quiet 80?


Due to the many different questions I see about Air Conditioning, I am including this overview to help us better understand each other for trouble shooting. A basic air conditioning system has a Thermostat, Air Handler or Furnace Fan and a Condensing unit. In a split system, the condensing unit (Condenser) is separate from the furnace and usually in the back yard. When working properly, it blows hot air. It connects to the cooling part of the system by 2 copper lines. One large line and 1 small line. The part that cools the house is the "Evaporator" and is usually on top of the furnace inside the square metal box (Plenum). When the Air Conditioner is running, the large copper line should be cold and the smaller line should be warm. Common signs of low refrigerant are that both lines are the same temperature and/or frost or ice has built up on the large line at the condenser. The thermostat will normally display room temperature on till it is touched to change the setting. It could have a "Span" setting as well as times and temperatures. The operating "span" of MOST residential thermostats is 40 to 90 degrees. That means you can set it as low as 40 degrees and no higher than 90 degrees. It probably has a fan switch also. When in the "ON" position, the fan will run constantly, 24 / 7, but the condenser will still cycle on and off as needed to keep the house at set point. If you have a suggestion to include in this paragraph, please let me know. Roger

There are service ports on the ends of the two copper lines at the condenser. Be VERY careful not to get any air in the system. Air carries moisure which will create acid and destroy the system. Don't touch the the smaller line. Pressure there is usually over 200 PSI. You sound like you have done this before. If not, let me know. Roger

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1 Answer

Filter location? Rheem Classic Super Quiet 80, RCBA 2457GG14XI


Open the two side panels. The filter is at the bottom held down with a wire spring. Release the spring and the filter can be removed.

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1 Answer

Rheem criterion gas furnace


Check freon, you will need guages on the condensor, also make sure the cond, outside unit is operating

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