AboutJ Cook Expertise With 25+ years experience, I am familiar with residential, commercial, and industrial HVAC equipment including but not limited to boilers, chillers, reciprocating and screw compressors. I am trained in all manners of control wiring.
Experience I currently have three HVAC licenses and Refrigeration license by the State of North Carolina. I have been in this field for over twenty years. I have been a service technician for a contractor and also worked at a state college in the repair and maintenance of steam lines and equipment. I am currently the Building Maintenance Superintendent for a municipality.
Question How do I test if I'm getting any signal to the gas control valve? It is a Honeywell VR8204-2050. Controller is a Honeywell S8610U. It doesn't appear that gas is going to the pilot (can't manually light), no spark (no clicking). Any help is greatly appreciated.
Answer If you are not getting a spark or clicking, this has to happen before the pilot valve opens. This is controlled strictly by the Honeywell controller. Check the wire attached to the W terminal strip at the furnace with one voltmeter lead on the W and one on the common terminal. If you do not have 24 volts between these two terminals, the thermostat is not sending the signal for heat to initiate, if you do have 24 volts, there is either a failed safety, a safety that is doing its job, or the controller has failed. Thanks J
