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Toyotomi om 180 random shutdowns
My OM 180 sometimes will shut down before the fan reaches full speed. The thermomistors have been changed, air pressure switch changed, burner cleaned, flame sensor cleaned, nozzle changed, fuel delivery checked. The dealer can't isolate the problem and his solution is a new OM 128. It serves as house heat and hot water. The problem started after an air mover replacement(leaky coil) and water heater service. An air eliminator was placed in a tee on the relief valve side. On successful light off, two quick clicks can be heard from the unit, when it fails, one click is heard them a click a few seconds later that coincides with the trouble light coming on. do I need a new heater or is it a problem that can be fixed. Thanks