ChicagoSuburban
Active Member
New replacement tankless hot water heater has gas/water combination valve. The ignition is started by a micro switch which gets pushed/pulled by the water valve diaphragm when water flows. I see ignition sparks. I can hear the gas valve solenoid clunk sound. However, no gas is flowing. What could be the issue? All pressures are good. No blockage. Why am I getting to fire?