Pump and heater wiring causing: Water sw open error (2024)

D

Dave C In Ontario

Well-known member
Feb 16, 2021
48
Courtice, Ontario, Canada
Pool Size
13400
Surface
Vinyl
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-40
  • Jun 16, 2021
  • Add bookmark
  • #1

My automation panel is still on order, so my electrician temporarily brought main power from my panel, to a disconnect box ( similar to what you'd have for an air conditioner ) Anyway both my intelliflo vsf and raypak 266k heater is powered from that box.
again this is supposed to be temporary until I get my panel.
The heater is throwing Water sw open errors because when the pump stops.. there is nothing except the heaters flow switch to stop the heater.
Should I just run my pump 24/7 at 41 gpm flow so there is always enough flow for heater..
How do people usually do this?
I am trying to run a schedule ( basically run for 8 hours.. off for 5. run 7..off for 4.
If you try to use the internal scheduling of the pump.. how do you control the heater to be in sync..
Or can I just rely on the flow sensor switch in the heater ... that seems wrong to me...

Jimrahbe

Mod Squad

TFP Expert

LifeTime Supporter

Jul 7, 2014
33,502
Bedford, TX
  • Jun 16, 2021
  • Add bookmark
  • #2

Dave,

Why are you worried about the heater errors.. As long as the heater is not running without water there is no real issues.

Personally, I see no value in turning your pump on and off during the day. My suggest is to run it for whatever time you want to run it and have it off the rest of the time..

So.. if you want to run it 12 hours a day, run it for 12 hours and then have it off for 12 hours..

I have a SWCG, so I run my pump 24/7, because I like to make a little chlorine all the time and skim all the time. But.. I don't have a heater so I can run at a pretty low RPM. I am not much of a fan of running in the VF mode..

Thanks,

Jim R.

D

Dave C In Ontario

Well-known member
Feb 16, 2021
48
Courtice, Ontario, Canada
Pool Size
13400
Surface
Vinyl
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-40
  • Jun 16, 2021
  • Add bookmark
  • #3

Jimrahbe said:

Dave,

Why are you worried about the heater errors.. As long as the heater is not running without water there is no real issues.

Personally, I see no value in turning your pump on and off during the day. My suggest is to run it for whatever time you want to run it and have it off the rest of the time..

So.. if you want to run it 12 hours a day, run it for 12 hours and then have it off for 12 hours..

I have a SWCG, so I run my pump 24/7, because I like to make a little chlorine all the time and skim all the time. But.. I don't have a heater so I can run at a pretty low RPM. I am not much of a fan of running in the VF mode..

Thanks,

Jim R.

My original schedule has the heater running at night at just the lowest speed. I live with woods 4 feet from the pool edge..and get a ton of insects pollen, a few leaves.. so I like the constant skim as well. The Day time run at 41 gpm is to allow the heater to run.(min. heater flow is 40)
I lost 12 degrees on my pool temp by having it off just 18 hours yesterday. (down to 50 degrees f last night)
so the day time run is really for me to be able to get in some warmer water when done work.
Anyway, the error code is saying that the heater was not getting water so shutdown..I just thought relying on a safety sensor might be bad.. as the heater gets abruptly shutdown and doesn't have water flow to cool it.
So I was just wondering, is this just the normal way for the heater to be stopped for those without automation panels?
I'm okay with error codes, If they don't mean I'm shortening the life of the heater.
But, if it's normal or no big deal, I'll just go back to the schedule. Thanks..still learning.

Jimrahbe

Mod Squad

TFP Expert

LifeTime Supporter

Jul 7, 2014
33,502
Bedford, TX
  • Jun 16, 2021
  • Add bookmark
  • #4

Dave,

Instead of just having the pump shut off, I'd have another schedule that ran the pump at a slower RPM, to the heater stops working, but there is still plenty of water passing through the pump for half an hour or an hour.. That will be plenty of time to cool the heater down.

Or you could run fast enough to run the heater in the day time and slower for just skimming at night..

Thanks,

Jim R.

  • Pump and heater wiring causing: Water sw open error (3)

Reactions:

Dave C In Ontario

D

Dave C In Ontario

Well-known member
Feb 16, 2021
48
Courtice, Ontario, Canada
Pool Size
13400
Surface
Vinyl
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-40
  • Jun 17, 2021
  • Add bookmark
  • #5

Jimrahbe said:

Dave,

Instead of just having the pump shut off, I'd have another schedule that ran the pump at a slower RPM, to the heater stops working, but there is still plenty of water passing through the pump for half an hour or an hour.. That will be plenty of time to cool the heater down.

Or you could run fast enough to run the heater in the day time and slower for just skimming at night..

Thanks,

Jim R.

Thanks Jim, I like that suggestion..always end a heater schedule with a 20 minute low rpm schedule.

Last edited:

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Pump and heater wiring causing: Water sw open error (2024)

FAQs

Why is my Raypak pool heater not kicking on? ›

Check the Power: If your Raypak pool heater isn't working at all, the problem could be something as simple as a lack of power. Go make sure there aren't any tripped circuit breakers in the fuse box, then check that the unit's time clock is set to the “On” position.

What does it mean when my pool heater says no demand? ›

No demand means that you have met the desired temperature. If the pool temperature falls 2° below your Set Temperature , then the heater will come back on. Then it will register a heating prompt, letting you know that the heater is back on. Pool and Spa Expert: Patrick D.

Why is my pool heater not detecting water? ›

Clean the filter, skimmer, and pump baskets. Remove all removable parts, take out debris, and rinse with a hose before reinstalling the piece. Turn your pool heater back on. If you still do not have enough water pressure, consider checking valves and safety switches.

Does pool heater restrict water flow? ›

Some pool owners only use their heater 5% of the time, yet their water flow is restricted the 95% when the heater is not in use. Bypassing the heater during the hot summer months when it is not necessary can improve water circulation.

Should pool drain valve be open or closed? ›

For proper water circulation, it is best to position the flap so that it is about 2/3 closed. This will allow for more flow through the main drain than through the skimmer, which will promote a "bottom-to-top" circulation throughout the pool.

What does PS open mean on a pool heater? ›

The PS code indicates that the water pressure switch in the heat pump is open, meaning there is no water flowing through the heat pump. The heat pump requires a minimum of 30 gallons per minute flowing through it to operate.

What is open outlet water heater? ›

For open-outlet (low-pressure) storage type electric water heaters, they are designed to supply only one serving point and the outlet is controlled by a special water mixer which maintains a vented passage for the air inside the tank to the atmosphere.

What does the code if mean on a pool heater? ›

There are different models of Hayward units, some use a spark igniter, some use a glow igniter. Most of the time, the IF code means that the igniter has failed, the gas valve has failed, or on units with flame sensing technology, the flame sensor is dirty and needs to be cleaned with sandpaper.

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