My mom has a 30-year old Teledyne Laars pool heater. The heater will fire up, then shut off after about a minute or two. If I move the thermostat up, it will fire up again, then off in a minute or two.
Her pool serviceman says that the heater has to be replaced - I don't have much confidence in his knowledge of heaters and heater repair.
I've read on this forum some info on limit switches and pressure switches. I'm a relatively-savvy home DIY'er, but have never owned a pool. The heater gets lots of pine needles and spider webs. There's plenty of water/pressure coming out of the ports in the pool (I also read on this forum that sometimes low pressure can cause a heater to shut off) Other than cleaning out the obviously accessible areas (e.g. burner tubes, chimney), does this sound like a problem that a good pool heater repair company might be able to fix?
Thanks for any advice