dprocket

yep, we're back in business. Thanks for the help everyone, especially @CanadianSpaTech. Now that we're up and running, anything I should do about all those white deposits? I think they are leftover from that chlorine disk I tried out a few months ago.

I spoke too soon! We are at 91 degrees.... looks like we're on the right track! Hopefully we can try it out tomorrow.

Board with new relays is installed. The spa is running, but it's been going for about 15 minutes and I feel not hear. Water temp is 54-degrees. The tube that water flows Thu out of the heater tube does not feel warm to the touch. Not sure how long it would take,but I would expect I would feel something by now. I'm going to let it run for a while, but I don't think my problem is solved yet. 😕

As it turns out, I have a buddy to does this sort of board repair, so the board is with him while I patiently await it's return. Can I use any sort of 10G wire to create the new jumper between the relays?

Here it is. No doubt. I'm on the hunt for a circuit board repair place. I've never done that before, so it's something new. Can they just pop off the old relay and put a new one in? Solder in new connections and test everything? It looks like the relays are very inexpensive ($15).

Ok, I swapped the wire. The tub is running, but it's been a few hours and no change in temperature, unfortunately.

Cool. I may even try this late tonight. Thank you.

I am unsure, so this may be where I call in a pro. I might replace the wire/jumper to see what it does, but I'm not versed enough on the electrical components. Unfortunately, in my area, I don't have lots of confidence in the spa repair people. So I need to do some checking.

I believe it to be from a chlorine disc , because earlier this year I put one of those chlorine discs in the tub (I had some leftover from my pool). I put a half of one in the skimmer and didn't like how it worked. So opted not to do it any more. That Is the only thing I've changed to the tub in years. I've been in the guts a few times over the last several years and this is the only time I've seen build up like that..so I'm assuming it's from that disc/cake.

This evening, I looked inside the old heater tube. I was surprised to see a build up of chlorine sediment in the tube and on the elements. I also noticed it caked on the inside of the connectors of the tobe in either side of the heater. I do not use bromine in this tub. I've used pool chlorine and shock for many years. Bromine caused skin irritation for several family members but we've had good luck with treating not like a pool. Thoughts on this?

I removed the wire and have it turned off. I won't have time to take the board completely out for a week or so. What are the implications of putting a new 10G wire in there and testing it out? Can I power on the HT and let the water at least keep circulating with the wire removed? (I guess the burnt up wire likely wasn't doing anything anyway). I read that those relays can burn up of a strap is not tightened correctly on a heater install. I don't see any burn marks around the relay, but surely will have to remove the board to see if there's any sign of burn behind.

Wow. Thanks. have not even noticed that. I will get into this and report back in a few days.

I didn't get a pic of the board last night. Here's the schematic. Update...Wrong photo haha!... trying again!

Nothing. A few hours later and no temp change. I'll test more on Wednesday evening.