“Water sw open”. Raypak 266 digital. (2024)

Perhaps some ideas here...

Ok. I’ve been working on it for the last hour. I unpowered it and powered back on.

if the heater is in “Remote mode”. It will fire up even if my automation isn’t calling for heat. I have even gone so far as to unhook my automation and it still fires up even know there is no call for heat.

Manual mode, it is functioning as normal.

Make sure to keep notes of what you have done so far and do coming up so we can trace back to what worked.

@ajw22 @jimmythegreek @Pool Clown @bdavis466 or any others that might have input please just in!

I am confused. Are you past the "water switch open" problem and the heater is running?

Describe your current problem.

When I came around the corner to my heater this morning I could hear the electronic ignition trying to start every few seconds. Pump was not running because I had it turned off. The display was alternating “no demand” and “water sw open”.

I unplugged the heater

When I plugged the heater back in, “water sw open” was gone. I turned pump on circulate but made sure heat was off On my controller. The heater kicked into “spark” and fired up even know my controller was not calling for heat. I powered heater off and disconnected the 2 wire connection to the controller. Again, when I powered heater on, it fired up.

I switched heater from “remote” to “manual” and the heater functions as it should. In my opinion when Heater is on “remote” mode, the heater is always acting like there is a call for heat.

uxbridgechris said:

When I came around the corner to my heater this morning I could hear the electronic ignition trying to start every few seconds. Pump was not running because I had it turned off. The display was alternating “no demand” and “water sw open”.

Click to expand...

That was what would be expected with the pump not running. “water sw open” means there is no water flow which there was not.

uxbridgechris said:

I unplugged the heater

Click to expand...

No reason to do that. Just turn on the pump.

uxbridgechris said:

When I plugged the heater back in, “water sw open” was gone. I turned pump on circulate but made sure heat was off On my controller. The heater kicked into “spark” and fired up even know my controller was not calling for heat. I powered heater off and disconnected the 2 wire connection to the controller. Again, when I powered heater on, it fired up.

Click to expand...

Where did you disconnect the 2 wire "firemans switch"?

uxbridgechris said:

I switched heater from “remote” to “manual” and the heater functions as it should. In my opinion when Heater is on “remote” mode, the heater is always acting like there is a call for heat.

Click to expand...

So that says you need to open up the heater and see what is going on with the 2 wire connection there. It sounds like the 2 wires are shorted in the heater. Maybe a critter got inside and chewed the wire.

uxbridgechris said:

alw22. I am 99% sure you solved the problem. The 2 wire from my controller was too short in 2018 when I installed it so I spliced it. I cut the wire before the splice and the problem of it wanting to fire up had stopped. My multimeter is at work but I suspect that splice is bad and maybe a strand is poking thru. Thanks so much. Will follow up when I repair and test. Raining here now.

Click to expand...

And now we have "the rest of the story".