I have an older inground hot tub with a Teledyne Larrs EG175 heater. A few years ago I installed a brand new burner unit to convert it from Natural gas to LP. It worked great until this season. now it will light and run but it will not shut off after the temp. gets to the setting? Could this be something other than the thermostat?
Thank you,
Steve

Unfortunately, no one ever answered this. I think maybe you got it repaired anyway and didn't share the news or the cause of the problem. It was a good question. What say you.?

Unfortunately, no one ever answered this. I think maybe you got it repaired anyway and didn't share the news or the cause of the problem. It was a good question. What say you.?

Well actually I never have got it repaired. I just have not used the hot tub much and when I do I have to get out and shut off the heater. I still am interested in resolving this issue.
Steve

http://www.jandy.com/html/productsupport/#manuals

I can't find an EG manual but a lot of the heaters are similar but with different types of control boards.
Look at the LG manual on the above site. Around page 30 it shows how to test the temperature sensor thermister located up in the water jacket. and the heater control.. If this diagram is close to your model setup it won't take much to locate the problem with a VOM meter. You may want to check out some of the other manuals on that site to see if any exactly match your heater and controls circuits.
lol