Articles, Blog

Fixing A Cold Hot Tub…

December 5, 2019

Hey casket here So I wish I was doing a video today on smoking. Maybe some ribs. Maybe a pork shoulder Maybe a 16-hour Brisket No, such luck Today, I’m showing you how to fix a hot tub so my wife bought me a hot tub last november for my birthday six months later This is now may and it quit heating the other day I’ve determined that it is the heater relay board that went bad And [I’m] going to show you how to detect and determine That it was a heater relay board and how to repair that I have the port the part ordered And it won’t be here until Monday, so I’ll show you Monday Which is about five days from now How to replace the heater relay board this is a Caldera paradise series, and it’s the [Hawaiian] Model So there was a couple of clues With regard to this heater feeling when [there’s] caldera Paradise hawaiian hot tub the first thing I noticed That it was set to 104 [as] you can see but it dropped and It kind of stabilized it around 96 degrees And it held at 96 for a couple of days Kind of told me that the heating element was probably getting electricity But it wasn’t getting enough and if you look at the display The temperature light is not flashing If the temperature light is flashing on most of these hot tubs Or there’s an error indicator it usually means that there’s an issue with the [high-limit] sensor or the pressure switch or the thermistor So I’m not getting any of those error codes on the display [I] Should mention in this video you’re seeing the temperature light flicker? But in reality is not you’re seeing the temperature light flicker, and you’re seeing the 82 and the f flicker and in reality they [are] not it’s this is an anomaly [of] the video camera, so Just for clarification as you’re watching this display None of these indicators are [flashing] [their] all solid And of course the pumps work So the issue is going either going to be with the [eater] The heater Relay board or the Heater control board? or the main controller board So once again, let’s go to the hut We could find out you Okay, so it’s Monday and the new board has arrived. Here’s the new one. Here’s the old one I’ve already removed [the] Feed for the main 240-volt Lines right here. I’ve removed the Leads for the heater. Which is down below here, and I want to point out quickly with my voltmeter [I] was only getting from the ground to the one lead for the heater nothing the other lead did the heater was 110 volts and Testing both leads here was zero and this should be 240 volts between these two contacts that tells me that this more than likely this is a bad board and Like I said, I’ve already begun removing it and once I removed it There you go You can see where it burnt [the] relay had burnt Which is a good sign, [because] that means the heaters is Good, and it was the board that went bad You can also see a little bit of brown a little bit of melting There on the control board on the heater relate relay control board I’ll also mention you know you’ll see in the photos previous that the limb Light was green right there, which indicated [that] the limit the high limit sensor and the circuitry for the high limit switch and the Pressure switch is working properly and also when I had the heater turned up you’ll see that the heater light was on and was red Indicating that the control unit is calling for heat So that’s a good sign the other sign is when I took this panel off When I took the cover off this control panel, I smell something burning and You can actually see you can see the soot buildup that [occurred] when that relay went So I’m going to install the [new] one now. I’m not going to leave the camera run because I’m running low on memory unfortunately, so be back shortly Okay, so I’m back the new board is installed and I wanted to show you that The leads going to the heater Now I’m getting 220 volts Before I was in getting anything, I was getting zero So as I was showing you both hot legs of the heater now. We’re showing 200 right around 225 volts leg to ground One side is 114 leg to ground on the other side Is about 110 and that’s about what we were getting on the other one which would explain why [the] heater was maintained maintaining 96 degrees? so we now have the red light here showing that the control board main control boards calling for [heat] the green light indicates that the High limit switch, and the high limit sensor is operating properly the thermistor is operating properly And the pressure switch by the way, I just replaced which is right here Here’s another view of it Here’s the old pressure switch, and you can actually see This is a way it came off, and if you see the manufacturer put a dab of paint on there And I’ll bring it back. That’s where it was. This is really where it should have been Like that that might be the explanation for the relay board one bad Okay, I’m back as I was saying before I ran on the memory that the pressure switch being out of adjustment or failing [can] cause a fluttering relay? The relay that starts to flutter and what were a period of time? Will eventually fail So that could have been the case here. [I] don’t really know but or 25 or 30 bucks Cheap insurance just to go ahead and replace the pressure switch So as you can see we’re back to 103 degrees And I’ve got it set 103 [September’s] 103 once again, I’ll remind you it’s not flashing What I’m looking at it through the video is flashing Probably similar to the raster lines used to see anil cathode Ray Tube televisions where the electron beam would give the horizontal lines You’d only be able to catch [that] if you were videotaping an old cathode Ray Tube [through] the lines of raster lines So we’re back up fully operational, and I hope this video helped Like I said if you have a newer model hot tub for the circuit board and it stops heating Don’t just assume that. It’s the heater [it] could be the heater relay board as well could be a few other things but Due to the heater relay board or the here itself so until next time Happy hot Tub

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  • Reply John Hibbs January 15, 2016 at 8:30 pm

    Thanks!  You saved me a ton of money and time.  Youtube rules!

  • Reply John Hibbs February 13, 2016 at 6:22 am

    I ended up repairing my relay card.  Do a search on e8ay for bulletproof kit Watkins.  It's a repair kit for the burnt board and improves the design so it will never burn out again.  I hope.  It's for people that have some soldering experience.

  • Reply cityhunterinak February 29, 2016 at 6:47 pm

    dude first off love the intro secondly you just saved me about $280 I replaced the heater thinking that was the problem then had a pro say it was the mother board and since it was so old I should just replace the who thing after I saw your video I checked my heating board with my multi-meter and sure enough nothing on one and 110 on the other I ordered the heater board it should come in around Saturday or next week (Alaska shipping) so thank you so much

  • Reply Alex March 31, 2016 at 4:31 pm

    The main control board is exactly the same as our Hotsprings Sovereign (the control board died but the heater relay was fine)

  • Reply Paul Vila April 17, 2016 at 10:01 pm

    Really excellent video. I did similar trouble shooting and using multi-meter found my control board seemed OK — removed it just to check for any burned spots and didn't find any. I figured out the circulator pump was bad — it was very hot, and although not obvious, turned out to not be moving water. And, circulator not flowing water through heater it won't work (blinking "heat" on panel). Pump was $180 online and $200 at my neighborhood store .. being a bit impulsive I went and got it, put it in and all's good. Thanks again for educational and helpful video. Next one will be about smoking brisket right?

  • Reply Jim Murphy November 8, 2016 at 3:46 am

    Very Very Good

  • Reply Neil Citraro December 6, 2016 at 4:49 pm

    a very common problem in this model for the heater board to go bad or relay to go bad.

  • Reply Neil Citraro December 6, 2016 at 4:50 pm

    if you replace the board you can get a gfci tripping after. this can be a condition of a bad element as well.

  • Reply Mike. Scalice December 11, 2016 at 3:34 am

    my hot tub wont stay warm what could be the problm

  • Reply Ted Hansen December 11, 2016 at 6:54 pm

    I have a Caldera Elation that is not heating.  I do not have a multimeter handy, but the heater control board you speak of shows some discoloring between the relays.  All indicators point to the heater board.  Where did you get yours?  Is there a part number?   It look identical to mine. Thank you so much!

  • Reply John Milner February 26, 2017 at 10:12 pm

    6 months old and no warranty?

  • Reply Dave Mullen July 30, 2017 at 10:40 pm

    My question would be "What caused it to burn out ! will it do it to the new one " ??? I always want to know WHAT CAUSED IT TO GO BAD !!!!

  • Reply Anthony Reedy September 18, 2017 at 10:23 pm

    Thanks so much! I took my control board off to find it had a burnt spot just like yours. Going to replace it. Where did you order yours from. Mine is a caldera paradise series as well.

  • Reply ZenNaster November 13, 2017 at 9:00 pm

    I work on spas and I can tell you this is a fairly common issue with calderas. I believe it's an issue with the relays just getting weak due to kicking on and off all the time. You can actually de-solder those relays and put new ones in and it will work just fine.

  • Reply Greg Nettles January 12, 2018 at 11:59 am

    Hot spring and caldera sucks Watson sorry

  • Reply Greg Nettles February 10, 2018 at 10:22 pm

    Hope u changed it out with the newer version of the old board??

  • Reply Bob Wilkowski March 23, 2018 at 12:50 am

    Probly the reason the circuit board burned is because the solder joint on the relay developed a crack and started arcing, it probly could be repaired by cleaning the circuit board and resoldering the connection.

  • Reply Eric Kunz March 25, 2018 at 5:25 pm

    I fixed mine two months ago with no parts!! The problem is that the pc burned because it needs more conductor in that area. If you can solder and drill creatively, it's possible.

  • Reply Bob Wilkowski April 18, 2018 at 9:37 pm

    I used to be a tv repairman and saw that happen many times

  • Reply Jr Weldon May 7, 2018 at 8:29 pm

    I could have a failed pressure switch, my temp will continue to drop, I can raise it again with multiple hits to the thermostat every 5 minutes or so but it will drop again. I replaced the 96" therm. line. Pressure switch or board?

  • Reply Stan Kapica August 2, 2018 at 7:10 pm

    I had the same issue on a Caldera Geneva. I spoke with a local repair shop and they said it's a common issue. I replaced my relay board pretty cheaply and also the pressure switch. The gentleman there also mentioned that could have been the issue. For 25 for the pressure switch might as well do it especially when it's rusty!

  • Reply Katie DiSimone October 21, 2018 at 2:48 am

    Thank you!!! Sitting in my repaired, hot spa now having replaced the heater relay board. Thank you google. Thank you YouTube. Thank you amazon. Thank you random William on the Internet for posting this 👍🏻👍🏻

  • Reply Derek Harwell January 6, 2019 at 5:35 am

    we got 42

  • Reply Derek Harwell January 6, 2019 at 5:35 am

    soooo yeah and we don't have the Hawaiian model

  • Reply Derek Harwell January 6, 2019 at 5:36 am


  • Reply G Lasser March 6, 2019 at 10:51 am

    next on the list will be pump seal leak then unglued pipe unions. Enjoy the journey & fun learning curve 👍🏻

  • Reply Bruce April 13, 2019 at 10:32 pm

    I have a 2 pump River Ridge Spa…. also, won't heat up past 96 degrees. Where did you get the replacement board?

  • Reply Paul Perryman April 28, 2019 at 7:33 pm

    I’ve got a green LIM light and no red heater light. Hot tub is staying about 92. Should I reset my high temp reset switch? Caldera Geneva

  • Reply Dan Altenburg June 1, 2019 at 5:36 am

    Great video. I am experiencing the same problem on my 2003 Caldera Geneva model, which is super close to your Hawaiian model. Your tips have encouraged me to open up the panel and change out these two items without the cost of a service call.

  • Reply chemicals pool June 6, 2019 at 9:16 pm


  • Reply dawley76 October 3, 2019 at 6:20 am

    The temperature light is flashing tho

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