Motorapido
New Member
Where do I find the high limit switch and fan control switch on a 1973 vintage Rheem 3040 -110 gas hot air furnace, standing pilot, natural gas.
I'm guessing the fan control temperature switch is inside the jacket-surface-mounted galvanized box with the white push button for manually turning on the fan.
Before I start removing panels from the outside to get a look inside, I'm seeking more info. Would both the high temperature limit switch and the fan switch be inside of or behind the manual fan box with the fan push button, which is mounted on the furnace jacket, up high and near the top of the furnace?
My huge local plumbing/HVAC supply desk professionals can't seem to find schematics or parts data on this 1973 Rheem furnace, which seems strange for such a large brand name. I'm assuming that after I locate and remove the high limit switch and the fan sensor switch that I will find numbers imprinted on those two parts so that my HVAC parts counter can sell me replacement control switches.
Please advise on the location of those two control switches, and many thanks.
I'm guessing the fan control temperature switch is inside the jacket-surface-mounted galvanized box with the white push button for manually turning on the fan.
Before I start removing panels from the outside to get a look inside, I'm seeking more info. Would both the high temperature limit switch and the fan switch be inside of or behind the manual fan box with the fan push button, which is mounted on the furnace jacket, up high and near the top of the furnace?
My huge local plumbing/HVAC supply desk professionals can't seem to find schematics or parts data on this 1973 Rheem furnace, which seems strange for such a large brand name. I'm assuming that after I locate and remove the high limit switch and the fan sensor switch that I will find numbers imprinted on those two parts so that my HVAC parts counter can sell me replacement control switches.
Please advise on the location of those two control switches, and many thanks.