Working with a 20 year old Hercules spa pack...

The heat on this thing never shuts off when the pump is running. I verified that the thermostat is bad and am replacing it. Here's where I have a question...

The thermostat capillary tube is actually clamped to the OUTSIDE of the heater. Is this going to work OK?

Here's a picture. Yeah...I know it's not pretty...

should work, but better if it was on the input side of the heater so that the heater does not affect reading of actual water temp in low flow conditions - insulate the sensor to better read pipe/spa water temp and not under skirt temp

Thanks for the reply. The capillary tube was underneath some sort of black goo...so I guess that was the insulation you were suggesting. I'll install the new thermostat and see what happens.

We sure have a nice spa control that will replace that hercules system... AND its only 355.00

think about it...! grin

BARB

You think my control pack looks rough...you should see the actual tub!!!

I'm going to limp this old girl through the summer and see how it goes. If I decide to replace the pack, I will definitely be coming your way!

Hello spa babe!

I also have one of these old Hecules units that has been working pretty well for a couple of years since I rebuilt the tub....nice and simple. I saw in this post that you have a replacement available and was wondering what that unit would be. I currently am having issues which I think may be the themostat. I have power going to the timer and outlet yet no jets heat, etc.....when rotating the temp selecter there is no clicking to indicate that the themostat is working ( got that from your articles ) ..so anyway may be looking to upgrade in the future and would like to see what you recommend. Thanks......