- Feb 28, 2022
- 36
- Pool Size
- 15400
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Hayward Aqua Rite (T-15)
We just had a pool built which includes a Hayward H400FDN heater. Unfortunately, we're having problems with it right away.
When trying to heat up the spa to default setting of 104°F we're getting up to about 90°F when it starts making this awful noise and everything starts shaking as you can hear/see here: New video by Andrew Angell
It shuts itself down and displays a HS code on the screen, which apparently means "too hot". The info I'm finding is that the sound is water boiling in the heater, and the cause of this is usually water flow problems. However, when the heater doesn't have enough water flow/pressure, it shuts itself down with the LO message displayed. We're not getting that. Instead, we're getting the shutdown with HS code.
The plumber did come back to troubleshoot with me, and we made sure we're getting as much flow and pressure as possible and cranked the pump up nearly max. The waterfall, bubbler, etc. were looking great, but this did not solve the problem with the heater.
What confuses me is that the boiling point of water is 212°F. How in the heck is the water getting that hot inside the heater while the thermostat still reads less than 100°F?
Hoping that somebody in here can help me with how to troubleshoot this sort of thing when water flow does not seem to be the issue. Any information on this would be greatly appreciated. Thanks!
When trying to heat up the spa to default setting of 104°F we're getting up to about 90°F when it starts making this awful noise and everything starts shaking as you can hear/see here: New video by Andrew Angell
It shuts itself down and displays a HS code on the screen, which apparently means "too hot". The info I'm finding is that the sound is water boiling in the heater, and the cause of this is usually water flow problems. However, when the heater doesn't have enough water flow/pressure, it shuts itself down with the LO message displayed. We're not getting that. Instead, we're getting the shutdown with HS code.
The plumber did come back to troubleshoot with me, and we made sure we're getting as much flow and pressure as possible and cranked the pump up nearly max. The waterfall, bubbler, etc. were looking great, but this did not solve the problem with the heater.
What confuses me is that the boiling point of water is 212°F. How in the heck is the water getting that hot inside the heater while the thermostat still reads less than 100°F?
Hoping that somebody in here can help me with how to troubleshoot this sort of thing when water flow does not seem to be the issue. Any information on this would be greatly appreciated. Thanks!