How to Fix Water SW Open on Pool Heater (2024)

How to Tackle the Pesky “Water SW Open” Error on Your Pool Heater

Hey there, fellow pool lover! Learn how to fix Water SW Open error on pool heater to ensure a safe and comfortable swimming experience. We’ve all been there, gearing up for a relaxing dip in our heated pools, only to be met with that mysterious “Water SW Open” error on our heaters. Before you throw in the towel (pun intended) or start pulling your hair out, let’s dive into what this message really means and how to send it packing!

How to Fix Water SW Open on Pool Heater (1)

  1. Decoding the Mysterious “Water SW Open” Message

Hey there, water enthusiast! So, you’ve stumbled upon the riddle of the “Water SW Open” message on your pool heater. Feels a bit like your heater’s speaking in alien, right? But worry not! Just as we’ve cracked the code of those cryptic text messages from friends, we’re about to do the same with this heater hiccup. Imagine your pool heater as that friend who drops vague hints about what they want for their birthday. It’s not really blaming itself, but rather whispering, “Hey, something’s up elsewhere in the system!” Kind of cheeky, right? Let’s dive deeper and get chatty with our heater’s quirky language!

1.1. What’s the Heater Trying to Tell Us?

How to Fix Water SW Open on Pool Heater (2)

Okay, pool lovers, gather ’round. So, your pool heater’s flashing that “Water SW Open” message like a neon sign in a retro diner. And you’re probably thinking, “What on earth is it trying to tell me? Did it have too many poolside mocktails?” Oh, if only heaters could talk, right? So, How to Fix Water SW Open on Pool Heater?

Imagine for a moment your heater’s like that chatty friend – you know, the one that can’t resist spilling the tea at brunch? It’s trying to get your attention, wave its little mechanical arms, and shout, “Hello! Over here! Flow problem!” But instead of just saying it outright, it’s giving you riddles. Classic!

Now, let’s clear something up: the heater isn’t throwing a tantrum about itself. Oh no, it’s more sophisticated than that. It’s more like that same friend dropping not-so-subtle hints about their relationship woes, making you play detective. It’s suggesting, in its cryptic way, that there’s some mischief afoot somewhere else in the system. And it’s our job to play Sherlock.

So, grab your detective hat, your magnifying glass, and maybe even a mimosa – we’re about to unravel this mystery together! Are you ready to dive in and decode the drama?

1.2. The Usual Suspects

Alright, my poolside detectives, it’s time to get down to business. If your heater’s “Water SW Open” message were a scene in a movie, we’d now be in a dimly lit room, with a lineup of shady characters against a wall, awaiting identification. The atmosphere? Thick with intrigue.

First up, The Meddling Filter. Standing tall, it seems innocent enough, but sometimes it’s clogged up tighter than a jam jar that just won’t open. You know the one. You’ve banged it, twisted it, even sweet-talked it, and yet… nothing! Our filter can be just as stubborn, holding onto debris like it’s some treasured keepsake from an ex.

Next in line, Those Shy Shut-off Valves. Acting all aloof and sometimes downright sneaky, these guys might just be the ones holding things up. They’re like the introverts at a party, staying closed off, causing a bottleneck at the entrance.

And then we have The Sneaky Crimp Terminals. Hidden away inside the heater’s depths, they might occasionally throw a fit. A bit like your phone’s charger that only works when twisted at that just right angle.

So, which one’s causing the ruckus? Time to play detective, dust for prints, and get to the bottom of this poolside caper!

  1. Roll Up Those Sleeves: Let’s Fix It!
How to Fix Water SW Open on Pool Heater (3)

Hey there, DIY star! Ready to roll up those sleeves and channel your inner fixer-upper? We’ve got a pool heater that’s playing hard to get, and it’s time to woo it back into action. Think of this as a spa day, but for your heater. A little pampering, a little TLC, and maybe even a pep talk. Yes, even heaters need a bit of encouragement now and then. So, grab your toolkit, pop on that catchy playlist (the one that makes you feel invincible), and let’s show that heater some love! Ready to dive in and become the poolside hero we all need?

2.1. The Filter Fiasco

Alright, let’s chat about the filter, that diva in the pool world. Ever known someone to make a mountain out of a molehill? That’s our filter when it’s having an off day. When it’s clogged up, it’s like that drama queen friend who overreacts to a tiny smudge on their white shoes. Honestly, a bit of debris and it’s like the sky is falling! But don’t fret, darling. A good clean, maybe a pep talk, and it’ll be back to being the life of the party. So, put on your best ‘can-do’ attitude, and let’s tackle this filter fiasco head-on!

2.2. The Valve Dilemma

Ah, the shut-off valves! Those mysterious turners and twisters of the pool realm. Ever felt like someone’s giving you mixed signals? That’s your valve when it’s acting up. A little too shy or maybe just a touch moody. When they’re not fully open, they’re like that indecisive friend in a restaurant—taking forever to pick a dish and holding up the whole order. But hey, a little nudge, a gentle twist, and they’re back in the game. So, let’s give them a bit of guidance, help them make up their minds, and dance through this valve dilemma with grace and gusto!

2.3. The Terminal Trouble

Now, onto the crimp terminals – those tiny unsung heroes deep within our heater. Think of them as the behind-the-scenes tech crew of a live show. When they’re on point, everything’s smooth sailing. But oh boy, when they throw a wobbly? It’s like that awkward moment when the mic screeches during a concert. Nobody likes that feedback! Maybe they’re feeling a bit neglected or perhaps just yearning for a spotlight moment. Either way, a careful look, a gentle tweak, and they’ll be back to harmonizing perfectly. So, lights, camera, action! Let’s dive in and troubleshoot this terminal trouble.

  1. Keeping the Boogeyman Away: Preventing the Error

Alright, brave souls, who’s up for a ghost story? Just like warding off that closet boogeyman with a trusty flashlight, we’re about to keep those pesky “Water SW Open” ghouls at bay. Think of this as setting up protective spells around your Hogwarts (I mean, pool heater). Prevention’s the name, and magic’s our game. Regular filter clean-ups? That’s our Patronus against grime. Open shut-off valves? Our shield charm against water flow woes. And an eagle eye on those terminals? Our magical map whispering, “I solemnly swear I’m up to no good.” So, wand at the ready! Let’s keep that heater boogeyman away and bask in poolside paradise.

3.1. Be the Filter’s Best Friend

How to Fix Water SW Open on Pool Heater (4)

Hey there, superstar! Ever dreamt of being besties with a celebrity? Well, in our pool’s world, the filter’s the A-lister, and it’s time to join its inner circle. Think of your filter as that fab friend who loves a spa day and a bit of pampering. Sometimes moody, sometimes flashy, but always essential. A gentle clean, some reassuring words, and you’ll be its go-to person. You know, the one it calls during its dramatic episodes. So, grab a brush, play that feel-good playlist, and serenade your filter. Time to shine, bond, and become the ultimate filter fanatic!

3.2. Play Peek-a-Boo with Valves

Every now and then, play a quick game of peek-a-boo with your shut-off valves. Ensuring they’re always open is like making sure your pet cat hasn’t accidentally locked itself in the pantry… again.

3.3. Terminal Check-ins

Alright, tech enthusiasts, it’s pep talk time! Dive deep into the world of crimp terminals—those backstage maestros that keep the show running smoothly. Picture them as that friend who’s always juggling a million things but rarely says, “Hey, I need a check-in!” But just like your over-achieving buddy, they appreciate it when someone notices their hard work or the occasional glitch. It’s all about those regular heart-to-hearts. A visual once-over, a gentle wiggle here and there, and you’re golden. So, pull out that toolkit, crank up your jam, and let’s have a chit-chat with our tiny unsung heroes. Keep the vibes high and the connection tight!

3.4. Keep the Waters Happy

Dive in, water-lovers! Imagine your pool as that friend with an infectious laugh that lights up the room. When they’re giddy, everyone’s spirits soar, and when they’re down, oh, we all feel it! Keeping those waters happy is the secret sauce to pool nirvana. Think spa days with perfect pH levels, little chit-chats ensuring clear, sparkling smiles, and the occasional pep rally cheering for ideal water flow. By being attentive, you’re not just being the pool’s best buddy; you’re also ensuring that it remains the life of the party. So, cue the happy tunes and let’s set the stage for some poolside euphoria!

To Infinity and Beyond…

There you have it! With a dash of effort and a sprinkle of preventive love, you can keep your pool heater singing and those “Water SW Open” woes at bay. And if all this sounds too overwhelming? Well, there’s always a trusty professional just a call away.

Happy swimming! And may your biggest poolside problem be deciding which floaty to use next.

View Our Past Blog Posts Here:

  • Do You Remove Skimmer Basket When Vacuuming Pool?
  • How Long After Putting Chlorine in Pool Can You Swim?
  • How Long After Adding Bleach to Pool Can You Swim
How to Fix Water SW Open on Pool Heater (2024)


Why is my pool heater not getting enough water flow? ›

A dirty pool filter wins for the most popular water flow issue on a heater service call. Luckily, it's also the easiest one to diagnose and fix. You can overcome this issue by having a pool heater service tech or pool specialist remove the filter and run the pump again without a filter in.

What does open water sensor mean on pool heater? ›

As for your issue. (open water temp sensor) That means the control board can no longer read the temperature of the incoming water.

How many years should a pool heater last? ›

Often you need to replace a few essential parts, not the entire heater. Things like your climate, water chemistry, and maintenance habits will impact the lifespan of your pool heater. Pool heaters will last anywhere from 10 to 25 years. Gas pool heaters have the shortest lifespan, at 5-10 years.

Does a pool heater have a check valve? ›

The reason you will need a check valve if you have a pool heater and chlorinator is that the concentrated chlorine in the plumbing near the heater will corrode the copper or cupro nickel in the heat exchanger. Thus causing leaks.

Can a pool heater get clogged? ›

Your pool heater contains a filter that prevents contaminants from circulating through the filter and causing a problem. However, if the filter becomes clogged, it can prevent the correct amount of water from passing through. Without sufficient water pressure, your heater won't be able to work.

How do you adjust the pressure switch on a pool heater? ›

Apply power to heat pump. Slowly rotate the adjustment wheel on the switch. Keep turning the wheel until the heat pump indicates it is receiving water. The display will no longer indicate "NO POOL/SPA WATER FLOW".

What should a pool heater be set at? ›

Pool water temperatures typically range from 78ºF to 82ºF. The American Red Cross recommends a temperature of 78ºF for competitive swimming. This coincides with good fuel savings. However, this may be too cool for young children and the elderly, who may require a temperature of 80ºF or higher.

How do you know if a pool valve is open or closed? ›

In order to tell if the valve is open or closed, the general rule is, if the handle is switched 90deg to the flow, it is off. As you can see from the diagram above, if the handle is in line with the flow path, it is on. Simple.

How do you test a water heater switch? ›

  1. Turn Off the Power to Your Water Heater. Photo: brizmaker / Adobe Stock. ...
  2. Check for Electricity. ...
  3. Remove the Access Panels. ...
  4. Set the Multimeter. ...
  5. Check the Reset Button in the Upper Thermostat. ...
  6. Disconnect the Wires. ...
  7. Test the Continuity of the Upper Thermostat. ...
  8. Determine the Water Temperature vs.
May 16, 2024

How do you reset a tripped water heater? ›

To reset it, you'll need to press the red reset button on the ECO, which is usually attached to the upper thermostat. When a water heater starts tripping the ECO repeatedly, it's time to call a plumber for service.

Top Articles
Latest Posts
Article information

Author: Foster Heidenreich CPA

Last Updated:

Views: 5642

Rating: 4.6 / 5 (56 voted)

Reviews: 87% of readers found this page helpful

Author information

Name: Foster Heidenreich CPA

Birthday: 1995-01-14

Address: 55021 Usha Garden, North Larisa, DE 19209

Phone: +6812240846623

Job: Corporate Healthcare Strategist

Hobby: Singing, Listening to music, Rafting, LARPing, Gardening, Quilting, Rappelling

Introduction: My name is Foster Heidenreich CPA, I am a delightful, quaint, glorious, quaint, faithful, enchanting, fine person who loves writing and wants to share my knowledge and understanding with you.