Jandy LRZ NG Heater - Stops at 90 degrees

sixfive34

0
Silver Supporter
Apr 27, 2017
27
Atlanta, GA
We have a Jandy LRZ natural gas heater. This is a new issue and we've previously had no issues for 4 seasons of use. The heater is heating the spa to about 90 and stops. I use iaqualink and the temp is set to 102. The control panel on the heater is cycling the three messages below:
SPA HEAT WATER: 103 SET: 104
FAULT *CHECK IGN CONTROL*
REMOTE TSAT ENABLED

The temp on iaqualink shows 90 degrees and I confirmed that with a instant read thermometer. I've read a few things here about the flame sensor but those posts were about the heater not heating at all. Mine is heating the water from 63 to about 90 with no apparent problems. It just won't go past that point. Looking at the heater control panel- it seems like it's reading one temp and iaqualink is finding another.
 
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