My Laars Lite Teledyne Laars model LLD natural gas heater seems to be running normally at some times. The pilot starts and it runs for a decent 8 minutes and then suddenly shuts off. My guess is that one of the sensors is automatically shutting it off, but the water flow is fine and there does not seem to be any outstanding issues. Any help would be greatly appreciated!
Laars Lite Teledyne Heater shuts off randomly
- Thread starter Andy_B
- Start date
- Jul 21, 2013
- 53,289
- Pool Size
- 35000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-60
Welcome to TFP.
Jandy bought Laars Pool heaters. See if your heater is one of the models in
Jandy bought Laars Pool heaters. See if your heater is one of the models in
No, the one I have is an LLD, and I have tested the methods with the manual I found online. However I found that the 24v transformer seems to have an issue. It consistently running at only 3-5v and when the heater shuts off, the transformer does too. I hope replacing the transformer may fix it?
If you are measuring voltage at the transformer secondary it should always read (about) 24V.
After the transformer there is a string of permissives that have to be satisfied before the ignition controller will start it's cycle. After those permissives make up you should measure about 24V at the "TH" terminal on the controller. This is the call for heat. If water pressure, the fuse or any one of the other steps in the permissive string is open then the ignition cycle won't start.