Question about Honeywell Heating & Cooling
I installed a new honeywell gas control valve #100112706 and thermopile #100093984 because the old control valve was flashing a 2 code so I went ahead and replaced both items. The pilot light will light and then the birner will ignite but won't stay lit over 15 seconds then slowly go out. The new control valve still flashes the 2 code. The new themopile checks out at 750ma in about two minutes. What else could the problem be?
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Posted on Jan 02, 2017
SOURCE: ifs40 w/ new thermopile
If the pilot shuts off within seconds of the burner, I strongly suspect you are having a problem with the hi-limit circuit. Check your wiring. The slightest unwanted grounding will cause the valve to drop out.
You also need to inspect the mounting of the bulb for the high limit. Make sure it isn't covered in debris. It should be clamped close, but not touching the heat exchanger. Grease needs to be able to flow on both sides of the bulb.
You'll need to test the switch with a meter or a jumper (for TESTING ONLY!). Remember, the hi-limit switch may be doing it's job and be the symptom, not the cause. But if the switch is tripping open prematurely, you'll need to replace it. (Part# 1177) Are you testing with enough oil in the vat?
Posted on May 31, 2008
Is this a standing pilot furnace, or electronic igniton?
If standing pilot, does the heater use a fan to blow air through the heat exchanger?
If the answer to those questions is yes, then check that the pilot orifice is not partially plugged and that there is a strong pilot blowing against the thermocouple. If there is, replace the thermocouple. If not, check the orifice again, and check that the inlet screen to the gas valve is not filled with gas line trash.
If the the pilot flame is good and it continues to go out, the thermocouple magnet in the gas valve may be weak. Replace the gas valve as to get just the magnet and coil is not easy.
Reply back any questions you may have.
Posted on Jan 28, 2009
Are you certain you are connecting the generator to the correct terminals? Is the pilot head partially blocked not allowing the flame to reach the generator even though the pilot is lit? Can you read the millivolts on the generator leads? Is the reading 400mV or higher? I assume it will be with a new generator but if it is not then the flame is not across the generator as it should be. If it is, be certain you are connecting the two leads properly and in the correct order. The generator has polarity so it needs to be connected to the valve properly. The tag up inside the heater should give you the correct locations for the white and red wires on the valve.
Posted on May 29, 2010
Hello, it sounds like your Furnace might be shutting off due to your high limit switch.A limit switch will open when the furnace overheats due to low airflow, . check air filter, clean blower wheel, and check to make sure the blower wheel is running at proper speed and not dragging sometimes cause by a weak capacitor. Anything that restricts airflow will cause a limit switch to open.
Posted on Mar 08, 2011
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