What is the diagnotic light on the contro, oad dooing. How may flashed? Also check the pressure switch. If the glow plug igniter is not glowing when you stat the cycle then most likely the presure switch is the problem. To check, remove the black hose from the fan side and suck in on the removed end. You can jum the blue and white wire also to se if it strats. The key is the red diagnostic light. The number of flashes telyou, what is wrong. Two and/or thrtee flashes is a pressure valve problem
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