Rheem Heating & Cooling - Page 3 - Recent Questions, Troubleshooting & Support

The fan relay is located in the air handler side of the system. Replace it and the fan will shut off normally.

Probably a weak breaker. I would change it and see if it happens again. If the problem continues call a hvac guy out

Unit may have have iced up and defrost timer came on which is emergency heat check pressures and refrigerant

This will be dependent on the capacity (tonnage or BTU/Hr) of the condenser, its location and how much refrigerant will be needed to added / replaced - plus the labor to do it. A typical 2 - 3 ton residential system (air handler / condenser - no duct work, etc.) can run $2k and up.

Can you give me info on the unit I’m happy to help further over the phone at https://www.6ya.com/expert/vincent_f7b7c5f4dedd2565

short in thermostat or heat switch

42 would be a 3.5 ton I’m happy to help further over the phone at https://www.6ya.com/expert/vincent_f7b7c5f4dedd2565

It sounds like your system might be low on coolant. Check the pressure of the main line and check it against the specs. You may have a leak in the system.

look on the mane plate on outside unit... has voltage ratings model serial type of freon factory charge etc.

If this is a reasonabley new style furnace it's because your flame sensor, they get tarnished and you have to follow the Orange wire on the left side of the burners that leads to the screw (1/4" hex) that you have to remove before you can remove the sensor. Once you do you will need to clean the sensor (it's just a rod bent to a right angle) use some fine grain sand paper, or Emory cloth, and put it all back together, and there you go.

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.

Either lack of refrigerant, stopped up metering device or capillary tube/s, or lack of air flow (due to bad blower motor, or dirty indoor coil)

Check thermostat. Check for a burnt out ignitor.

Need more info

Possible bad motor and/or bad capacitor and/or bad blower relay.

Reset the switch. Check the heat exchanger thoroughly for blockages, cracks or holes. Check induced draft motor for proper operation. Check flue pipe and chimney for obstructions.

Clean the flame sensor.