I’m working on a Martin Industries Unvented Room Heater Model VFIP. This unit runs on propane. The heater has a history of the pilot going out after several days. Cleaning the pilot didn’t fix the issue. I tested the heater valve (SIT 820 millivolt) and pilot assembly and some of the values were out of spec. Also the pilot adjustment on the valve seemed to be unresponsive so I replaced the valve. With the new valve the heater started up and was running good. After a few days I wanted to check things out and I noticed that the tip of the pilot was rusted and the end had fallen off. It was not like this earlier. So I bought a replacement ODS pilot assembly (same as the old assembly). After installing the new pilot assembly the heater would not turn on.
The pilot lights, but when I call for the burner to light no gas is sent to the burner. All connections are correct and my thermostat is working (checked and also bypassed). When I check the thermopile it read a little over 500 mV. When the thermostat calls for heat the thermopile drops to around 350 mV. I also tried to adjust the pilot but it seemed to be unresponsive (same as the old valve). So is this new pilot assembly bad or is there something else I can check?
The pilot lights, but when I call for the burner to light no gas is sent to the burner. All connections are correct and my thermostat is working (checked and also bypassed). When I check the thermopile it read a little over 500 mV. When the thermostat calls for heat the thermopile drops to around 350 mV. I also tried to adjust the pilot but it seemed to be unresponsive (same as the old valve). So is this new pilot assembly bad or is there something else I can check?
