First post on here - just moved into a house last fall and getting my first pool up and running! I'm a former pool tech (a long time ago though) so I'm slowly remembering all the fun I had "back in the day"!
I finally had our propane tanks filled this week and got a chance to fire up the 'ol Jandy Lite2 - I had the pool inspected by the company I used to work with (very trust worthy!) and they said it looked good, but I didn't have enough propane before it was closed to really let it roll. I had a company help me open it, and they said it was working just fine when they fired it up - but again, I didn't have enough propane/pressure to keep it going.
Propane folks came out this week and today I fired it up to 80 in "pool" mode and went to check how it was working - it ran for about 30 seconds and shut down as I watched the "pool temp" sky rocket to 90! I'm not getting any error codes or anything so I hadn't started to take a multi-meter to anything just yet (and it's late in the day) - but to me it seems like flow/temp sensor on the outbound side. I can't find anyone here that has the exact same issue, but pretty close but no one really posted their resolve!
I have the valves opened all the way in/out of the heater - and there is great flow coming out into the pool - so I don't think there could be much blocking...but hadn't really dug in that far. My other thought was either of the high limit switches - but I figured I'd get an error code if those were off? I do know the heater hadn't been used for a few years...but again, no problems at all firing up or throwing any error codes...so that's kind of good!
I did take a video of it, if that helps:
Jandy Lite2 Heater Cycling Fast - YouTube
Back when I was a tech - I really only handled the simple stuff...heaters were definitely not my thing! I was more the "get that _____ out of the pool" guy and fixing valves/plumbing/etc.
Any help would be greatly appreciated!