Heating spa last night issues

jrsmith25

Silver Supporter
Dec 20, 2023
105
Tennessee
Pool Size
20000
Surface
Plaster
Chlorine
Salt Water Generator
Heater has been great so far. Last night we fired it up and it quickly got to around 93, but then it kept bouncing off 93 similarly to the way it does 104 when working properly. Did this for an hour and slowly broke through to where it got up to around 100 and w got out. I checked all the setup and both pool and spa are still set to 104. It would just start blowing cool water as soon as it hit 93 (like it normally does at 104). Any idea?

I wonder if it has anything to do with it that I kept getting the "T-CELL Current Sensor Short Chlorinator1" warning over and over.

I have not looked into what that is. Possibly a short or something? A bad connection somewhere? Thanks for any help.
 
When did you last clean your filter?

Check the bypass valve in the heater header.

It is not a short or something.

You have a water flow problem or an internal overheating problem causing the heater to shutdown and cycle.
 
It has been maybe a month-6 weeks.

I just now cleaned them. They were fairly tan to light brown colored? I reset the pressure gage on the manual relief valve so I will know next time.

I don’t think I have a heater bypass valve.
 
There is an internal heater bypass in the Hayward heater header

See if cleaning your filter fixed things.
 

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