I have a Teledyne Laars Series 2 400n that went thru a freeze 1 year ago and broke the headers in it so I haven't been using it. A neighbor was filling in his pool and had one. He said his hadn't work in years. I asked if it leaked and he said no and that I could have it. Took his headers off, put it on mine and it runs thru fine with no leaks. Started it and it runs fine but turns off. I would guess it runs for about 1 minute and then turns off. Not every time but some of the time after it turns off I hear clicks. Not clicks like it's trying to start back up but one I can't explain. Almost like the sound when the heater is first turned on and the system engages. It will do that a few times and then nothing. Usually about 30 seconds later, maybe 1 minute it starts back up, runs for 1 minute and then shuts off.
I have no clue where to start. Any help would be much appreciated.