Question about Hayward H Series

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Heater shakes when running - Hayward H Series

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  • j_asa Jul 19, 2009

    loud banging or loud clicking

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Inside the heat exchanger is a governor valve like a car thermostat and a bypass valve that controls the temperature of the water in it by adjusting the amount of new colder water and heated water circulate in it.. When these don't operate properly they cause your problem get a certified rep to fix.

Posted on Jul 20, 2009

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Posted on Jan 02, 2017

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1. Very low water flow. If the skimmer or strainer basket on the pump or pool are clogged, or the filter is dirty, or the pump is old and not working properly, you can get just enough flow to activate the heater, but not have enough flow to do it safely. When there is too low of water flow, the water inside the heat exchanger evaporates into steam which creates pressure inside the exchanger which cannot be released, therefore making the heater "jump" or "shake" al over the place. This fix is easy if this is the case, fix the flow problem.

2. Hole in the heat exchanger. When heat exchangers start to fail, they get small holes in them letting air into the system. When this air gets super heated it expands and creates pressure just like the above situation (kinda). This will also create the shaking.

3. Completely clogged heat exchanger (inside the exchanger). If you fill off a well system, or have high metals and minerals in your water, these metals and minerals will attatch themselves to the inside of the heat exchanger thus clogging it and reducing the water flow through the heater to just about nothing. There are 3 cleanout plugs on the heat exchanger so that it can be regularly flushed. This should be done at least once a year.

4. Clogged heat exhcanger (outside the exchanger) This is the least likely, but if you are getting a bad burn on the heater due to not getting annual services, the heater will soot up, prohibiting the natural venting capabilities of the heater, and trapping ALL of the flames heat on the exchangers bottom. With nowhere to go , once again, the exchanger is super heater and pressure builds up enough to shake rattle the heater.

Sorry there are so many options for this, but all signs point to this heater needing a serious cleaning inside and out. It can be done by you, but should probably be done by a service tech.
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