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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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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

1 Answer

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

1 Answer

No comm


I had the same problem and resetting the system at the pool panel and remote (as per manual instructions) did not work. I found a solution on an online forum that suggested that the main power panel at the house be turned off, wait a few minutes, turn back on, then go out to the pool panel and restart the system.....it worked!

Jul 05, 2012 | Pentair Easy Touch Indoor Control Panel...

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...

1 Answer

We have A Coates pool electric heater and the heater poped the reset twice. How do you test for bad elements.


turn the power off and take an ohm meter to check for contunity from the electric wiring to ground at the heaters. If you have contunity from the heater to ground the element is bad. To check which element, disconnect the wiring at the elements and check each elememt seperatly. If you need more specific details, let me know and I can post a pictorial of the process on my company website for you to review.
Richard Johnson
EMSHVAC, Inc.
rjohnson@emshvac.com

Aug 22, 2009 | Pool & Spa

1 Answer

Solution for Jandy Lite 2 Pool Heater display flashes on & Off ..


Can a model LJ250P Propane 2005 model be installed indoors . The rating plate says it can. But manual says it cannot. What the hell????

Jun 06, 2009 | Jandy Laars Lite2 Lj 250,000 Btu Heater

1 Answer

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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