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My Coates Pool heater for my indoor pool is not heating as well as it use to. Any suggestions on how to fix this?

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2 Answers

On my coates 18kw pool heater it keeps blowing the small fuse that supplies theon/off switch and the controlboard..


It could be a bad coil in one of the relays for the heating elements. Model number off the side label will help. Age of unit and voltage will help with trouble shooting.

Jun 08, 2017 | Coates Pool & Spa

2 Answers

Where can I locate the filter for my Coates pool heater, and how can I clean it?


It is in a canister near the pump. Take it out and wash it with water.

May 03, 2017 | Coates Pool & Spa

1 Answer

I have a Jacuzzi J340 Hot Tub. I am having trouble with the heating. When the pump is on, the water circulates just fine. once the heater kicks on, it runs for about 10 seconds, then clicks to OH, and...


make sure the heating element isnt touching the casing inside the heating tube. if its an indoor tub, make sure the filtration cycles are not set to constant. constant filter cycles on an indoor tub will generate residual heat from the circ pump running 24/7, causing tub to heat past 104 degrees

Sep 15, 2013 | Jacuzzi Pool & Spa

2 Answers

Opened pool. Rheem heater has the service light blinking


rollout switch is open, and sns is a sensor failure. replace rollout switch, clean out vents, inspect heat exchanger. water sensor senses too cold or too hot water

May 28, 2010 | Rheem 266K to 399K BTU Swimming Pool...

2 Answers

I have a new coates heater and it takes 3 hours to heat my spa up


make sure the water flow is the same and the size of the heaters are the same. it sounds like the new one might not be the same kw.
there really isn't a solution to the heating not being the same if you have good water flow and the kw is the same as the old one.

Feb 21, 2009 | Coates Spa Heater 5.5 Kw Ct12406st

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