We have a Coleman Gas furnace model DGAT070BDD that won’t heat. When you turn it on it turns on normally. We noticed that it stopped heating. We checked to see if the light would blink but they did not. The lighter turns on and so does the sensor. We cleaned out the thermo sensor and checked the thermocouple hoping that would be the fix but it still was the same. The pilot lights for 5 seconds but then flame starts but doesn’t stay and shuts off. Then it starts to try again but can’t seem to stay on. We think it could maybe be the gas valve but we are not sure. We tested the gas valve and has 24 v and the inducer also works. Any help would be appreciated! Thank you in advance!
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