MasterTemp 200 Ignition Lockout

superlewa

New member
Jun 20, 2023
1
Texas
Hello, I bought a house about a year ago, and the heater worked initially, however this spring it is no longer working. It may be due to the 24 hour freeze we had this winter, however I kept the pump running the entire duration of the freeze to prevent issues. When I go to start the heater, it will click, I smell gas and there is no flame, it will do this a few times and the service heater light will come on. No LEDs on the other side of the board will light up. The ICM will flash 3x indicating ignition lockout. The igniter is hot to the touch and appears to be working. I have replaced the ICM, HLS, AGS, igniter, and thermistor. The thermal regulator still functions and I do not see any leaks in the manifold. I do not see any frayed wires. Any ideas as to what to try next?

Thank you
 
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