SOURCE: Vibrations and banging when heater is turned on
wow! That heater that you have is meant for a very large swimming pool, quite a bit oversized, i bet i gets the job done quick though. I have seen before that somebody plumbed in a heater backwards, there are elevated arrows on the black manifold of the heater, make sure inlet and outlet are plumbed in correctly. Make sure you get your water tested. Because the water in your hot tub is no circulating as often (I assume) as a pool would be, the stagnate water sits inside the heat exchanger. What can happen, for instance, if you have high calcium, is the certain tubes inside the heat exchanged can get so clogged with calcium and they are completely shut and the banging noise is due to excessive heat build up inside the heat exchanger. This can ruin a heat exchanger very quickly and the heat exchanger is half the cost of the heater if you were to get a new one. You can check and see if tubes in the heat exchanger are clogged by taking the manifold off of the heat exchanger, and shining a flashlight down the different tubes. However you have to disassemble quite a bit to actually be able to do that.
SOURCE: Jaccuzi hot tub will not heat?
sounds like it maybe the heater again. Have you pulled it out and checked the ohms? it should be at least 10.5 ohms
it could be the thermostat or the pressure switch - if either of those are not working it will not heat either.
SOURCE: jets not working
i have seen this in the past, a ground fault electrical outlet on the inside of a roman tub,if you have a 2 story house look for access panel on or by tub. otherwise you have to remove tile or other to access motor, you probably need a step too anyways
SOURCE: I bought a old hot tub that utilizes a timer and
It is very easy to trace an air switch...go to the control panel and find where the air switches connect. put it in a cup of water and start pressing switches to see which one is which (bubbles). Make sure that they are dry before you reconnect them. Try switching the air hoses and then pressing the corresponding switch to turn on a function.
SOURCE: Pool heater cabinet gets so hot it burned the wires
That condition is from rollout of the burner flames. Check the underside of the heater top for a buildup of debris. Clean it if necessary. You may notice your heat echanger looks like a BBQ pit. If so it is sooted over and needs to be thoughouly cleaned before further use.
If you find this condition, you should also look at your burner tubes once the exchanger is cleaned and the heater is operating. Be sure the flames are nice and blue and 3 or 4 inches tall. If they are not, and especially if they are mostly yellow/orange, you need to do some more inspecting for what is messing up your combustion, which would have led to the soot.
Finally, if none of the previously mentioned conditions exist, consider wind pressure over the top of the heater. In windy areas and in certain installation conditions, you may needa high wind stack to provide positive drafting of exaust gas.
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