Pool Heater, Knocking Noise

Comments · 95

• SC

  @scottmings9376 · 1 month ago

  Thank you for the video. My Raypak furnace had the identical problem and your video was an excellent guide. Mine is now working again. It is so hard to find a repair person in our area. Using your video made everything easy.

• VI

  @vincent22046 · 3 years ago

  Thanks for the video. I didn’t understand the noise before this. I learned from another repair video that the first step is to make sure all of the filters are clean. Most issues arise from decreased flow to the heater. The temp will rise inside with knocking sounds from boiling, and it will shut down. It saved me a lot of time and money.

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• CH

  @chrislavender3154 · 4 years ago

  Hi there.  Really appreciate you sharing this video.  It’s the same problem I had with this heater.  In addition to the debris I also had narrowing lumens in three of the water pipes.  I used a drill to open them up a bit.  Replaced the Thermal regulator as it was is nasty shape.  Was able to reconnect and fire everything up.  Heater started working…yay!  Clearly I need to pay more attention to balancing my water.

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• DI

  @Dimewick21 · 3 years ago

  Thanks for posting! My Jandy was having the same issue. A supposedly reputable pool equipment repair person came and told me I needed a new heater. 5500 installed that would have run. Luckily I found your video before making the decision to buy a new one. Though the Jandy is laid out a bit different, the components and general arrangement is the same. Followed your video, cleaned out the scale and now my heater is tip top.

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• JO

  @joelong9349 · 3 years ago

  Mine was doing this big time. I have a Raypak 336A which has a different cast iron manifold with just the 2 inlet and outlet pipes. The unitherm governor is behind the large square brass nut below the outlet pipe. Still this video shows excellent directions. Thanks.

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• DA

  @davidpage5388 · 3 years ago

  Had a tech come out 4 times. &nbsp;Tried another who attempted. &nbsp;No results. &nbsp; <br>Saw this video and it did the trick! &nbsp; 😊<br>THANK YOU!!

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• RE

  @repkechr · 1 year ago

  Cannot thank you enough for this video. Absolutely wonderful walk through guide. Took me awhile to clean out some of the tubes (combination drill and some light chiseling with a screwdriver), but otherwise very similar to what you showed here. Now it works like a charm. Huge thank you!!!

• GR

  @Greg-dj6nn · 1 year ago

  Thank you for posting. &nbsp;Mine was doing the exact same thing, and this saved me a lot of time and paying for a service call.

• DA

  @DaveWilburn-USAF · 5 years ago

  My heater was recently damaged due to the cold weather here in Texas, and I was getting ready to take this manifold off because it looks like that’s where the water is leaking from. I watch this video and it will be a big help for me when I go to take that off. I understand the effort it takes to make this and I wanted to say thanks for uploading it and making it available. Again it was a big help.

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• BO

  @boc7185 · 5 months ago

  Great video. I have the same issue including the high limit 2 fault codes. &nbsp;Testing the U.G. Today. Thank you!

• JA

  @James-vp2jn · 2 years ago

  Thank you for posting this video. &nbsp;I just replaced the igniter module on an older Hayward H400. &nbsp;The unit started making the same sounds. &nbsp;I will take a look at the thermostat, manifold, and bypass valve for scale build up.

• JE

  @jesapizza4197 · 4 years ago

  Pardon my French--but this is a balls on video. I followed along and found the first 3 tubes were clogged like yours. Strange--the other 6 were fine. However the vacuum was woefully inadequate. #2 from the right had calcified into rock--there was no vacuuming/chipping away at this crap. Northern Illinois well water. I pushed in and twisted the screwdriver to no avail--and then I thought about my spade bits! Worked perfectly. Used my oldest drill and almost burned it up, but I now have mostly clear pipes--and no knocking. Was careful not to twist during the drilling process. Thermostat tested fine in hot water as well. Thanks so much for doing this.

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