I was having trouble getting my heater going when I opened the pool for the season a few weeks ago. It was my first time opening the pool. A friend was able to help, so I’m confident I was following the right steps. I’ve owned the pool less than a year and the heater worked without issue for the last 6 weeks of last season that the pool was open.
Eventually got the pilot going, and it would fire, but it was having “big” startups and shutting off after <1 minute of run time. I thought maybe it was the pressure switch, or some other safety sensor shutting it down in error. Pump has good pressure, everything is clean, etc. I troubleshooted it with a multimeter and determined the pilot generator was good, and all sensors had continuity. Also checked all connections, and noticed one connection for the sensor below the burner was loose. Tightened it, and got the heater to run longer than the initial 30 second startup from before, but it was still starting abruptly. So, yesterday I decided to clean out the orifices. Much easier than I anticipated and two of them were clogged pretty badly with spider’s nests. After cleaning those, it started MUCH smoother. Had it running for an hour or two yesterday without issue and even turned it off and on again a few times. Water wasn’t hot out of the return, but from 55 degrees, it was definitely warming it. I’m not expecting hot water out of a 200k unit on a 55 degree, 19k gallon pool.
This morning I turned it on and no dice. Took the cover off, restarted the pilot, and it ran fine again. Ran it for another few hours today without issue to hopefully “shake the cobwebs off”.
So, I’m curious if any of this is normal beginning of the season type stuff, something obvious that can be corrected or if this (who knows how old) heater is on its last legs. I don’t have a spa, or heat it constantly, so it isn’t the end of the world if it’s a little finicky and I can squeeze a few years out of it. On the other hand, these Millivolt heaters seem like simple machines, so if its a $30 sensor, I’d love to extend the life.
Eventually got the pilot going, and it would fire, but it was having “big” startups and shutting off after <1 minute of run time. I thought maybe it was the pressure switch, or some other safety sensor shutting it down in error. Pump has good pressure, everything is clean, etc. I troubleshooted it with a multimeter and determined the pilot generator was good, and all sensors had continuity. Also checked all connections, and noticed one connection for the sensor below the burner was loose. Tightened it, and got the heater to run longer than the initial 30 second startup from before, but it was still starting abruptly. So, yesterday I decided to clean out the orifices. Much easier than I anticipated and two of them were clogged pretty badly with spider’s nests. After cleaning those, it started MUCH smoother. Had it running for an hour or two yesterday without issue and even turned it off and on again a few times. Water wasn’t hot out of the return, but from 55 degrees, it was definitely warming it. I’m not expecting hot water out of a 200k unit on a 55 degree, 19k gallon pool.
This morning I turned it on and no dice. Took the cover off, restarted the pilot, and it ran fine again. Ran it for another few hours today without issue to hopefully “shake the cobwebs off”.
So, I’m curious if any of this is normal beginning of the season type stuff, something obvious that can be corrected or if this (who knows how old) heater is on its last legs. I don’t have a spa, or heat it constantly, so it isn’t the end of the world if it’s a little finicky and I can squeeze a few years out of it. On the other hand, these Millivolt heaters seem like simple machines, so if its a $30 sensor, I’d love to extend the life.