hi guys,
went to a job just now, complaint was hot water not hot enough.
Got there, opened hot tap, and it was running warm, and only got hot when I slowed the flow rate.
I checked the burner pressure and it was only 6, and it sholudve been 10.
I removed 1 of the wires from the modulating coil from the gas valve, switched power back on and min pressure was ok.
Put the wire back on, and then the pressure wouodnt go above minimum, and now wont do so. I removed both wires from coil and measured the resistance across the wires and got OL, and when I measured the resistance across the coil the resitance was very high.
Basically, I dont know whether its the ignition board or the gas valve thats faulty. What do you guys think?
Thanks