I have a Rheem gas furnace that has been acting up. I just bought the house so I don't know too much about it. The model number is RGLA-06EA-AR and going by the wiring diagram it is from 1989. I have just replaced the thermastat so I know the problem is not that.
Here are the issues.
Will not set the house to the right temperature.
The gas will kick on three to five times before the whole system shuts down.
Flicking the thermostat from heat to off and then back on makes it start back up again.
Any ideae are welcome because I am out of them