I have a Rheem RRGG-07E25JKR package unit that will not heat (I have not tried to turn on the heat in about 8 months). The fan will run and a small fan in the unit runs but no heat. Apparently the ignition doesn't involve a pilot light since there is no "pilot" position on the gas control knob - only On and Off.
I use this unit from time to time to heat or cool a separate room.
Can you tell from the Model Number what the heating and cooling capabilities are? Average cost to replace it?