Question about Rheem Heating & Cooling
Furnace turns and runs for a few min and stops and start again never gets to temp set on thermostat
On properly sized furnaces there are a few controls to look at. Check the settings of the fan switch. If these are unchanged then there may be a reason the furnace is shutting off due to poor air flow and resulting high temperature. Check filter and verify air flow is good. It may be possible that a safety switch is failing and intermittently on and off. Are all the covers securely in place and hitting any safety switches? If not seated properly the cover may loosen when the fan runs and the switch shut off the unit. There is often a flame roll out switch that could have been strained. Lastly, has the thermostat been working long? Thermostats have internal heaters to stop the furnace which is called a heating anticipator. If the thermostat is near a heat source (heat duct, refrigerator, oven, person, hot water pipe), worn out, anticipator is set wrong (older electric thermostats have adjustable settings) or covered (yes, I have seen some covered) then the free room air cannot measure correctly and the thermostat cannot control what it cannot accurately measure. Of all these possibilities I would start with the thermostat and proper furnace air flow, second check the fan/high limit switch and third go component by component through the wiring diagram looking for defects in each component. If available follow the manufacturer's troubleshooting guide.
Posted on Jan 12, 2014
Tips for a great answer:
Feb 11, 2018 | Coleman Heating & Cooling
Mar 15, 2016 | Heating & Cooling
Feb 05, 2015 | Coleman Heating & Cooling
Dec 08, 2010 | Coleman Heating & Cooling
Dec 29, 2009 | Heating & Cooling
Apr 25, 2009 | Heating & Cooling
Jan 15, 2009 | Honeywell Electronic Programmable...
Dec 13, 2007 | Carrier XHD183D Air Conditioner
189 people viewed this question
Usually answered in minutes!