I have a rheem model #rgda-10ea-ar 100,000 BTU furnace and it works sometimes and not other times.I'm getting 24vac out of transformer and going into my w/r universal pilot spark control,but only getting 16.8vac out of cotrol on the pv,mv terminal going to gas valve.should there be 24vac coming out of control to gas valve all the time.I checked voltage when it was working and I was getting only 16.8vac at my gas valve ,is this right,or do I have a faulty control.Shouldn't I be getting 24vac out of control to the gas valve all the time.plus my flame sensor is a straight rod ,should it be angled.what could my problem be,help please if you can .Thank you

I have a rheem model #rgda-10ea-ar 100,000 btu furnace and it works sometimes and not other times.I'm getting 24vac out of transformer and going into my w/r universal pilot spark control,but only getting 16.8vac out of cotrol on the pv,mv terminal going to gas valve.should there be 24vac coming out of control to gas valve all the time.I checked voltage when it was working and I was getting only 16.8vac at my gas valve ,is this right,or do I have a faulty control.Shouldn't I be getting 24vac out of control to the gas valve all the time.plus my flame sensor is a straight rod ,should it be angled.what could my problem be,help please if you can .Thank youaa