Carrier split - heat burners cycle on and off
Carrier split unit in heat mode appears to basically operate OK. Once the pilot is lit and the burners come on, the pilot remains lit but the burners will intermittently cycle on and off. This appears to sometimes delay the blower from turning on. Once the blower turns on, it heats to the set temp and then shuts off. My concern is if this is the beginning to a major issue. Any ideas? Thanks.
Carrier split - heat burners cycle on and off
The pilot has an igniter. It clicks and the pilot lights OK. I have notice that the thermal sensing element gets red hot and after a few seconds, the burner jets light. The element appears red hot and the burners will still shut off. The pilot remains lit and I do not see or hear the igniter clicking which leads me to believe that the pilot sensor is OK, Moments later, the burner jets come back on. For simplicity, my first thoughts were to replace the pilot and /or sensor anyway. I was able to purchase the pilot assembly only to find that the ceramic sensing element and wire was not included. I have not installed it for this reason. I have noticed what appears to be two quick disconnect wires plugged into a nonmetallic square approximately 4 inches above the pilot. My guess is that this is the heat chamber sensor. Can this be removed and cleaned? Are there any test points or a schematic I can get my hands on to try and located and diagnose the operation of these temp sensors? Or is there a site I can log on to for this information. My unit model number is Carrier 58GS100-3. Thanks
Carrier split - heat burners cycle on and off
Thanks, when cold, across the sensor I read approx 0 ohms. Should I be reading a voltage drop instead of ohms? If I remove one of the leads from the sensor, the blower turns on. I have no problems with the blower so I guess that this sensor is not the issue. However, when the chamber is hot and the blower is on, the switch appears to have the same reading. Is there another sensor that monitors the burner jets to turn the gas valve on and off? I have not found any documentation in or around the unit. The control logic appears to be typical however without knowing what or where I am checking, I am just guessing. I have tried Carrier sites but to no avail. Worse comes to worse, I will have to call for service. That’s one way to figure it out.
Carrier split - heat burners cycle on and off
With the exception that the burner jets cycle on and off, the operations of the unit appears to be OK. Maybe I’m missing something…. Are the burners supposed to cycle? I don’t think they should or remember it doing it before. I guess my main concern is that the main valve assembly may be faulty. Sounds like a piece of change$$. Do you know if there is a burner flame sensor and where it would be located? Thanks.