Max Hot tub temp 100 degrees

Bensmith82

Member
Feb 26, 2022
12
Utah
Pool Size
24398
Surface
Plaster
Chlorine
Liquid Chlorine
I have a shared system pool/hot tub. I winterized the pool and am only using the hot tub in the winter. I have an IntelliCenter and Pentair mastertemp 400K heater. The temp for the spa is set at 104, but the actual temp it’s is reading won’t go above 100 degrees. Any thoughts on how to fix this issue?
 

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Is your heater running or shutting down.

Use a cooking thermometer and measure the actual spa water temperature as you would measure the temperature of a pot of water.
 
Is your heater running or shutting down.

Use a cooking thermometer and measure the actual spa water temperature as you would measure the temperature of a pot of water.
It runs and then kicks off. I’ll have to check the actual temp when I get home but it feels like 100 to me. I usually like it at 102.
 
Post a pic of your equipment pad and where the water temperature sensor is in your plumbing.

I don't see a heater model listed in your signature.

How old is your heater?

How far away is your heater from your spa?
 
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