Hello I have a 2000 Hotsprings Grande that I've had for a long time. It has been wirking find until recently. The red light started blinking and it shut itself off. I cleaned the filters and reset the breakers like I've done many times in the past but after about 15 minutes it shuts off again. Seems to me that the high limit is tripping but Im not 100%.
Ive checked the heateer with an ohn meter and it reads 10.2, i also checked from each power wire to the ground and they were open so that seems good. I replaced the circulation pump in 2016 and i know its running now but I can really test the flow that I know of. The thermostat and high limit sensors were replaced about the same time. Heater is the watkins no fault 6kw with green sticker. Ive checked wiring and all looks good. When i reset the breaker the heater comes on and i verified ~24v on the black and white wire going to the heater after the relay and before it goes into the heater bundle. All lights on the iq2000 looks good. Lim on green, htr on red. I think last time it had an issue i just replaced all parts so i want to test the sensors and pumo and anything else so i can replace only what is broken. Any additional troubleshooting steps would be appreciated. It snowed last night so i have to get this thing running todsy before it freezes. Thanks