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Thread: Hayward heater banging LOUDLY

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    Hayward heater banging LOUDLY

    I don't know if the sequence of events is important, but here is what happened:

    For the first time since having VS pump installed we had a freeze. Since our old freeze protection unit was not bypassed, the low flow of the pump is causing the heater blower to kick on and it cannot be turned off. Our temps were only supposed to be around 32 so I killed power to all the equipment. I think it got down to about 27 degrees, and the following morning I turned it on. There was an unbelievable banging sound coming from the heater. I'm not 100% sure, but I think that was without the heater actually heating.
    I let it sit all day thinking ice had gotten in there. It seemed okay later that evening. Ran the heater and everything. Several days later I fired up the heater again, all seemed ok. At that point the valves were set to return water to both the pool and spa, and suction only from skimmer. I then changed the valves for suction/return only to the spa, and the banging came back. I've read posts of people describing banging noises as sounding like gravel, or maybe popping. This sounds like someone is in there with about 8 hammers hitting the sides of the heater as hard as they can! It is physically moving the whole unit!

    I found a youtube video of someone working on the exact same heater, with the symptom being banging noises. The fix was a broken plastic diverter just inside the manifold where the PVC unions connect. Could this possibly cause banging that severe? Its hard to imagine steam and cavitation causing noises like I'm hearing. Any help would be greatly appreciated!
    28K IG, stonescapes pebble, raised spa, hayward heater, Pentair Intelliflo, Pentair 60ft DE filter, built around 1980, remodeled 2007.

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    Re: Hayward heater banging LOUDLY

    The banging is either a broken diverter or your water flow was not sufficient at the time. Depending on the age of the heater its probably the diverter.

    Here's my video on the problem... http://www.youtube.com/watch?v=UzHLiba3s1g
    Paul
    http://www.gastekservices.com A word of caution: When working with gas and electrical you might want to consider a licensed contractor. Consider the value of your life and others around you. If you would like to provide a review of the help I provided, please use the following link to leave a review. gastek - Google Search,

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    Re: Hayward heater banging LOUDLY

    Ah yes! That's the video I found! Thanks. I don't want to take it apart rt now due to freezing temps. I'll have to order the diverted of it's broken...

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    Re: Hayward heater banging LOUDLY

    I just re-read you original post. So you have the older IDL2 heater with a blower?
    Paul
    http://www.gastekservices.com A word of caution: When working with gas and electrical you might want to consider a licensed contractor. Consider the value of your life and others around you. If you would like to provide a review of the help I provided, please use the following link to leave a review. gastek - Google Search,

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    Re: Hayward heater banging LOUDLY

    Good day, what you are describing is water flow issues. This could be the By Pass assembly or just low water flow.

    John the Hayward Tech
    haywardtech@gmail.com
    Hayward Pool Tech
    80+ Years of Technologically Advanced Pool Product Manufacturing
    poolside@haywardnet.com

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