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Coates Appliances
Coates Appliances

Coates Appliance Error Codes

Coates has been the name to trust for quality and reliability in water heating equipment since the 1940s and continues to lead the industry in quality and performance across their entire line of swimming pool heaters. Their pool heaters are available from 1.5kW to 57kW and most can be ordered in single or three phase models. For large commercial applications they also offer heaters up to 300kW.


Pool Heaters Error Codes

The display will read "Err" when it detects a problem with the temperature sensor. This can be caused by a faulty sensor or a loose connection between the sensor and the temperature controller.

Element Inspection and Replacement: 
1. Turn off power at main disconnect switch and turn off pump. 
2. Drain pool heater. 
3. Remove service access panel opposite inlet/outlet. 
4. Disconnect element leads. 
5. Remove the four (4) element flange retaining nuts and extract element. 
6. Installation is the reverse of steps 1 through 5. (Reinstall element with new gasket) 

Annual Cleaning: 
Yearly, before winter, the pool heater should be drained and cleaned to remove any scale or sludge. More frequent cleaning may be required if pool water contains sediment or any amount of foreign matter. 
1. Turn off system at main disconnect switch. 
2. Open drain valve. 
3. Permit water to run until it is clear. 
4. Close valve and restart normally. 

If high temperature causes manual reset high limit switch to shut off the heater, disconnect power at disconnect switch and determine the cause before resetting. 
 



Coates Appliance Error Codes

Coates appliance fault codes

Coates appliance diagnostic codes

Coates appliance error symbols

Coates appliance common faults


Product Reviews:

It’s almost impossible to explain how such a small and compact unit is go
It’s almost impossible to explain how such a small and compact unit is going to be able to heat your entire spa or hot tub when you first set eyes on this particular system, but thanks to its almost 38,000 BTU capabilities it’s more than up to the task.
Published: January 7, 2015
poolheaterreviews.net
Source: poolheaterreviews.net

My pool is an above ground design that I sunk 2.5 ft. below patio grade. I
My pool is an above ground design that I sunk 2.5 ft. below patio grade. I added the insulated walls during construction before installing the liner. It is an oval 10 by 15 ft pool. About 3500 gallons. I just installed the 11 KW Coates heater. It was a big project since I had to add a new 240 V circuit from my house main panel along with # 6 awg wires (2 power , 1 neutral, and 1 ground) that fortunately fit thru an existing conduit under my paver patio. Added a “spa” box kit at the heater/pump location that has a 240 V, 60A GFCI (that was hard to find). Along with the solar blanket that I already had and we now have 87 deg pool water and expect to continue use of the pool into November. Fantastic!
Published: October 3, 2021
Brian P.
Source: poolweb.com

fast shipping, heater works amazing. heats my spa from 83 to 95 in 45 minut
fast shipping, heater works amazing. heats my spa from 83 to 95 in 45 minutes, simple install.
Published: October 18, 2021
Dan C.
Source: poolweb.com

Heavy duty piece of equipment. Bolted right up. Received as advertised in t
Heavy duty piece of equipment. Bolted right up. Received as advertised in timely manor.
Published: March 26, 2021
dave q.
Source: poolweb.com

I'm so pleased with your heater I tell everyone about it. I have insta
I'm so pleased with your heater I tell everyone about it. I have installed over 300 inground spas raypack heaters and Hayward's yours works very well.
Published: January 21, 2017
Joe t.
Source: poolweb.com

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