Sundance Altamar 850 temperature error

[brentosmond]

Hi, I'm getting an OH error and it's not reaching the correct temperature I set. I set 106 but it only reached less than 102.

I want to know the cause and how to fix it for my Altamar 850 that has been used for more than a year. Thank

[Sam]

could be dirty filter or low water level restricting flow through the heater. 

[CanadianSpaTech]

What year/date is the spa. Sundance/ Jacuzzi have a recall on Temp Sensors: https://www.sundancespas.com/en-ca/recall.html#:~:text=This%20recall%20involves%20Jacuzzi%C2%AE,bay%20of%20the%20hot%20tub.