Rheem Classic 90 Plus Furnace – Common Issues. The first common issue is the Furnace is not putting out heat. The furnace is not igniting. The heater is running all the time even when you lower the set point. The unit is running hotter than normal. The unit is heating certain rooms and not others.
I have a 14 yr old RHEEM IMPERIAL 90 plus furnace that is acting up! When it has set for (say over nite) it takes several tries to get the HSI (hot surface ignitor) to glow properly! … Resistance of HSI is ok,and 120 volts from IFC board is present at the HSI when it is required in .
If you remove the door, it powers the furnace off and you cant see the code. Catch 22. Unless you can firmly tape the door switch in place so .
I have a Rheem Classic 90 Plus in my condo, circa 1998. I moved in about a year ago, and have had no problems with the furnace until now.
Last night my furnace stopped working. I opened it up and it gave me the code for the pressure switch. The inducer will turn on for about 30 seconds and then .
Gas and Oil Home Heating Furnaces – Rheem Classic 90 Plus – No Heat – I have a Rheem Classic 90 Plus natural gas furnace. I’m not sure of the … I went through the little trouble shooting guide insid the cover. Got as far as .