CanadianSpaTech Posted June 10, 2021 Report Share Posted June 10, 2021 As the regulars here know I am a Watkin's spa idiot...just don't see many in my area so my knowledge is limited and there are several things going at once on from what I can tell. Have a Caldera spa "Martinique" (S/N: MRA4P5088) with no heat. On the topside I have Power and ready lights flashing in unison. Circ pump is running and moving water. On the circuit board I have a Red LED at D21, Green at power ON and also green LIM OK. All incoming power checks are good. At the top right of the small board there is a darkened area at See Photo 2: The heater tube black box has a drip see photo: Heater has continuity and measured 14.3 ohms. I did not test or jumper the pressure switch...it was 1000 degrees in full sun and was not thinking clearly...lol So where am I going and what am I doing?.. lol Go back and test/jumper pressure switch Replace heater relay board replace heater all of the above or... Recommendations? @RDspaguy @castletonia @cranbiz Quote Link to comment Share on other sites More sharing options...
RDspaguy Posted June 10, 2021 Report Share Posted June 10, 2021 Pressure switch would be my first guess. Then a flow issue or thermistor. They are a B**** to troubleshoot, so I just start testing everything I can test. If it isn't one of those, it's the board or controller. Not sure what the D21 led is. 1 Quote Link to comment Share on other sites More sharing options...
cranbiz Posted June 10, 2021 Report Share Posted June 10, 2021 Not sure why the board is discolored there, The diodes and resistors are a decent size for SMD's so there could be some decent current thru there. The IC is an Opto Isolater. They don't normally fail and are really cheap (like under $1) My guess is those components are OK, a stuck relay would cause those components to get hot, causing the discoloration to the board. Except for the opto isolator, the rest are easy to check with a multimeter. 1 Quote Link to comment Share on other sites More sharing options...
CanadianSpaTech Posted June 10, 2021 Author Report Share Posted June 10, 2021 Yeah I'll have to go back over again. Luckily only 10 mins away. When I went yesterday just had to much on the brain and it was XTRA hot and humid after a short rain and just didn't want to be there...lol. It happens. Yesterday me is such a D ck.. now Today me seems to think that it would be better if Tomorrow me deals with it...🤣 1 1 Quote Link to comment Share on other sites More sharing options...
RDspaguy Posted June 11, 2021 Report Share Posted June 11, 2021 @castletonia, any idea what a D21 led is? Quote Link to comment Share on other sites More sharing options...
castletonia Posted June 11, 2021 Report Share Posted June 11, 2021 2012 Martinique. Judging by the lack of USB port on the circuit board it appears to be the “ORCA” electronics. Without calling Caldera tech support I got no idea what that D21 LED is. Do the jets work? 1 Quote Link to comment Share on other sites More sharing options...
CanadianSpaTech Posted June 11, 2021 Author Report Share Posted June 11, 2021 5 hours ago, castletonia said: Do the jets work? Everything works just no heat/power out of H1 and H2. I see the D21 question asked every now and then but never an answer. Anybody know what's inside the black box on the heater? Is there anything serviceable inside that might be causing the drip. Quote Link to comment Share on other sites More sharing options...
castletonia Posted June 11, 2021 Report Share Posted June 11, 2021 I believe the pressure switch is inside the black box. From Caldera, no serviceable parts, have to replace entire heater though I’ve never taken one part so I’m unsure if you could source the pressure switch elsewhere. 2 Quote Link to comment Share on other sites More sharing options...
RDspaguy Posted June 11, 2021 Report Share Posted June 11, 2021 3 hours ago, CanadianSpaTech said: see the D21 question asked every now and then but never an answer. D17 is the common one on a hot springs, and seems to indicate a bad relay board. Never heard about D21 before. 1 Quote Link to comment Share on other sites More sharing options...
CanadianSpaTech Posted June 11, 2021 Author Report Share Posted June 11, 2021 10 hours ago, castletonia said: Without calling Caldera tech support Let me know what it would be WITH calling Caldera Tech Support... 🤣 Quote Link to comment Share on other sites More sharing options...
RDspaguy Posted June 11, 2021 Report Share Posted June 11, 2021 7 hours ago, CanadianSpaTech said: Let me know what it would be WITH calling Caldera Tech Support... 🤣 You need their number? Quote Link to comment Share on other sites More sharing options...
CanadianSpaTech Posted June 14, 2021 Author Report Share Posted June 14, 2021 Went back by and did some more testing with little success. I tried jumping the pressure switch at the circuit board but still no heat/change. Removed the black cover on the heater where there is noticeable water but could not see any drip or leaks but would have to say it is coming from the pressure switch. It looks like there is a small circuit board sandwiched inside the pressure switch and not sure if it plays a part in why jumping it at the board had not result. Thoughts? @RDspaguy @castletonia @cranbiz Quote Link to comment Share on other sites More sharing options...
RDspaguy Posted June 14, 2021 Report Share Posted June 14, 2021 On 6/11/2021 at 10:20 AM, CanadianSpaTech said: Caldera Tech Support... 🤣 Have you pulled the relay board? Is that a burn on the top left relay? Quote Link to comment Share on other sites More sharing options...
CanadianSpaTech Posted June 14, 2021 Author Report Share Posted June 14, 2021 I did tip the relay board forward and it looked good on the back around the relays. Only area was top right that was darkened. Have a new heater unit ordered. Heater needed to be replaced one way or the other due to the leak/drip and overall condition of the pressure switch that has a lot of green corrosion. Just the pressure switch not available and have to replace the complete heater unit. Relay board will likely be next but customer is not in a big hurry so one step at a time I guess. 1 Quote Link to comment Share on other sites More sharing options...
CanadianSpaTech Posted June 21, 2021 Author Report Share Posted June 21, 2021 UPDATE... Replaced the heater/pressure switch and all good. I guess the little circuit board in the pressure switch plays a part. When I tried to jumper the pressure switch at the circuit board it would not activate the heater 1 Quote Link to comment Share on other sites More sharing options...
CanadianSpaTech Posted June 22, 2021 Author Report Share Posted June 22, 2021 On 6/11/2021 at 12:01 AM, RDspaguy said: @castletonia, any idea what a D21 led is? FYI...The D21 stayed lit after install. 1 Quote Link to comment Share on other sites More sharing options...
RDspaguy Posted June 22, 2021 Report Share Posted June 22, 2021 ⭐ 1 Quote Link to comment Share on other sites More sharing options...
DM88 Posted September 27, 2022 Report Share Posted September 27, 2022 On 6/21/2021 at 5:40 PM, CanadianSpaTech said: UPDATE... Replaced the heater/pressure switch and all good. I guess the little circuit board in the pressure switch plays a part. When I tried to jumper the pressure switch at the circuit board it would not activate the heater Do you think it was the pressure switch the whole time or the heater itself? I am in the same situation, and the service tech bypassed the pressure switch at the board, but still no heat. They are recommending a new control board, but I have serious concerns about spending the $ on a new board only to find out it was that pressure switch the whole time. Quote Link to comment Share on other sites More sharing options...
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