I replaced the thermocoupling an the pilot light will light an stay on until I turn to the on position an turn the thermostat up to warm that's when the burner flames come on an immediately goes out including the pilot what's going wrong? Please help

Mike, you'll get a better answer if you post make and model number of the heater. Good luck

Perhaps the thermocouple was not the original problem. Perhaps the water heater (including pilot) shut down for other reasons.
Is this a sealed combustion chamber type heater? If so check air intake filter.

I replaced the thermocoupling an the pilot light will light an stay on until I turn to the on position an turn the thermostat up to warm that's when the burner flames come on an immediately goes out including the pilot what's going wrong? Please help

It's a he smart water has electric ignite


I replaced the thermocoupling an the pilot light will light an stay on until I turn to the on position an turn the thermostat up to warm that's when the burner flames come on an immediately goes out including the pilot what's going wrong? Please help

It's a he smart water has electric ignite


I replaced the thermocoupling an the pilot light will light an stay on until I turn to the on position an turn the thermostat up to warm that's when the burner flames come on an immediately goes out including the pilot what's going wrong? Please help

It's a ge smart water has electric ignite