Coleman Al Posted October 3, 2022 Report Share Posted October 3, 2022 Coleman Horizon 400 1999 not heating. No voltage at the heater when control is calling for heat. Pressure switch checks OK. Flow is good. Voltage from house reads 240 volts but zero at the heater connection. 30 amp fuse checks ok. Something in the control panel like maybe a relay?? Serviceable or am I looking at a new panel? Quote Link to comment Share on other sites More sharing options...
2001Sahara509 Posted October 4, 2022 Report Share Posted October 4, 2022 From what I have learned the relays are soldered to the board. They can be replaced though.From what Quote Link to comment Share on other sites More sharing options...
CanadianSpaTech Posted October 4, 2022 Report Share Posted October 4, 2022 The relay top right (K6) looks burnt and can see soot on the board. Remove the circuit board and look on back for darkened or flash burn marks at that relay. Relays are fairly cheap and can be DIY replaced.. if you have soldering knowledge and the correct tools. Those are open relays and they may be available but are used on older boards. Newer boards have a closed relay and if I was taking your board to my local electronics repair guy I would have him replace ALL the relays on the board with a closed type relay. It is an old board and relays wear out over time. Open relays are just that open and prone to dust and debris. If you are going to swap out the circuit board it may be cheaper to replace the entire system with a completely new Balboa or Gecko system depending on the cost and availability of the replacement board. I would repair the board for a fraction of the cost of new... But I have a guy. Where are you located? Quote Link to comment Share on other sites More sharing options...
Coleman Al Posted October 4, 2022 Author Report Share Posted October 4, 2022 Sounds like I need a guy. I’m located near Detroit MI. If I decide to DIY, suggestions for getting the correct relays? Quote Link to comment Share on other sites More sharing options...
CanadianSpaTech Posted October 4, 2022 Report Share Posted October 4, 2022 Try and Call them and tell them what you are working with and trying to do: https://hottubpartsofamerica.com/search.php?search_query=relays He also has lots of how to videos some on relays Quote Link to comment Share on other sites More sharing options...
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