Gas heater lights then goes out

Question

The machine turns on and trying to light and then shuts down does this about three times then stops , starts again but doesn’t seem like anything lights up who to call ? What kind of problem ?

Answer 1

Could be a defective thermocouple, a sensor to measure the temperature (either it can be too far away the pilot, push it close to it if the case, or is already defective, you could replace it).

You could also check the pilot tube, it can be blocked.