Jpd316 Posted October 23, 2021 Report Share Posted October 23, 2021 Picked up a cal spa used. I set the heater to 104 but it only heats to 100. My topside is a 2100. Any ideas? Quote Link to comment Share on other sites More sharing options...
RDspaguy Posted October 24, 2021 Report Share Posted October 24, 2021 4 hours ago, Jpd316 said: Picked up a cal spa used. I set the heater to 104 but it only heats to 100. My topside is a 2100. Any ideas? Several. Post pics of your equipment area, circuit board, and wiring diagram. Do you have a multimeter? 1 Quote Link to comment Share on other sites More sharing options...
Jpd316 Posted October 24, 2021 Author Report Share Posted October 24, 2021 I do have a multi meter. Thx Quote Link to comment Share on other sites More sharing options...
Jpd316 Posted October 24, 2021 Author Report Share Posted October 24, 2021 Seems to me that the heater isn’t working. The spa doesn’t stop circulating because temp is set to 100 but the heater light not lit and the spa temp has remained the same. Spa heated up to 100 the first day I got it but hadn’t operated correctly since then. Quote Link to comment Share on other sites More sharing options...
RDspaguy Posted October 24, 2021 Report Share Posted October 24, 2021 Turn off power and test heater for continuity. Should be around 10 ohms. Then remove the wires from the pressure switch (round thing on side of heater) and test it as well. Should be an open circuit, no continuity, infinity ohms. Unplug sensors from board and take an ohm reading on each. They will be in the 10k ohms range, so set your meter accordingly. Turn on power and set temp to 104. Are there any error codes on the display? Does the heat indicator turn on? Do the jets function properly (low, high, off)? Test for voltage across the heater terminals, should be 240v. Post reults. 1 Quote Link to comment Share on other sites More sharing options...
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