Coates High Temperature Limit Switch In stock$87⁵³

Coates 22003820 high temperature limit switch for Coates electric heaters

Coates High Temperature Limit Switch

Name: Coates High Temperature Limit Switch
Brand: Coates Heater
SKU: CHC-151-7588
Price: 87.53 USD
Availability: InStock

Ask a questionAPS # CHC-151-7588

In stock

$87⁵³

Get volume pricing Request a quote

30 day returns · Easy, with prepaid labels provided

Quick overview

Safety cutout The limit switch is what stops the heater when water temperature climbs past its set point.
For Coates electric heaters Matched to the Coates electric heater line rather than a generic thermostat.
Genuine part 22003820 The Coates part number, so there is no guessing at a substitute.
A common failure Limit switches age and trip early, or fail closed, and either way the heater stops behaving.
Distinct from the thermostat The thermostat sets the water temperature; this switch is the backstop behind it.
Small part, whole heater A failed limit switch takes an otherwise healthy heater out of service.

Full description and specifications ↓

Need a hand?

Bilingual support from pool professionals.

(888) 751-8084 Chat with a tech Email us

Frequently bought together

Current item Select Coates High Temperature Limit Switch

Coates Heater

Coates High Temperature Limit Switch

$87⁵³

Select

AquaChek

Silver 7-Way Pool and Spa Test Strips for pH, Total Chlorine, Free Chlorine, Bromine, Alkalinity, Total Hardness and Cyanuric Acid, 100 Strip Bottle

$34¹⁷

Select

AquaChek

4-in-1 Free Chlorine Test Strips for Swimming Pools

$20⁴⁰

Select

LaMotte

Mobile WaterLink Spin Touch Lab

$1161²⁰

Select

AquaChek

Pro 5-Way Pool and Spa Test Strips, 100 Strip Bottle

$23⁶³

Select

LaMotte

R-2086 ColorQ 2x PRO 7 Test Reagent Refill Kit

$106⁰⁹

Select

Pool Season

Polyquat 60 Concentrate Algaecide for Inground and Above Ground Pools, 32 oz

$35¹³

Select

LaMotte

ColorQ 2x PRO 7 Digital Pool Water Test Kit

$235⁹⁴

Select

API

Revive Pool Phosphate and Algae Remover, 32 oz

$53⁵¹

Subtotal

Similar products

Other products people compare with this one.

AquaChek

AquaChek Silver 7-Way Pool and Spa Test Strips for pH, Total Chlorine, Free Chlorine, Bromine, Alkalinity, Total Hardness and Cyanuric Acid, 100 Strip Bottle

551236

$34¹⁷

1

AquaChek

AquaChek 4-in-1 Free Chlorine Test Strips for Swimming Pools

511242A

$20⁴⁰

1

LaMotte

LaMotte Mobile WaterLink Spin Touch Lab

3581

$1161²⁰

1

AquaChek

AquaChek Pro 5-Way Pool and Spa Test Strips, 100 Strip Bottle

511710

$23⁶³

1

LaMotte

LaMotte R-2086 ColorQ 2x PRO 7 Test Reagent Refill Kit

R-2086

$106⁰⁹

1

Pool Season

Pool Season Polyquat 60 Concentrate Algaecide for Inground and Above Ground Pools, 32 oz

47245960

$35¹³

1

LaMotte

LaMotte ColorQ 2x PRO 7 Digital Pool Water Test Kit

2086

$235⁹⁴

1

API Revive REV32 32 oz pool phosphate and algae remover

API

API Revive Pool Phosphate and Algae Remover, 32 oz

REV32

$53⁵¹

1

Product details

Coates 22003820 is the high temperature limit switch used on Coates electric pool and spa heaters. It is the overtemperature safety device, not the operating thermostat.

What it is for

An electric heater puts a great deal of energy into a small volume of water. If flow drops or the control fails, that water can climb far past the set point. The limit switch is the independent cutout that opens under those conditions and takes the heater offline before anything is damaged.

When to replace it

Two symptoms point here. A heater that trips off repeatedly for no obvious reason can have a limit switch that has drifted and now opens early. A heater that will not start at all can have one that has failed open. Before changing it, confirm the heater actually has good flow, because genuine low flow will trip a perfectly healthy switch and the switch is doing its job when it does.

Specifications
Brand	Coates
Manufacturer part number	22003820
Type	High temperature limit switch
For use with	Coates electric heater
Ships	Parcel

Request a quote

Need a volume price, a freight quote, or pricing in writing before you order? We reply the same business day.

Request a quote

Customer reviews

More from Coates Heater

Coates 12411ST 11kW 240V single phase ST Series electric spa heater

Coates Heater

Coates 11kW 240V Spa Heater, Single Phase

12411ST

$841⁴⁷

1

Coates 34854PHS-4 PHS Series 54 kW 480 V three phase electric pool heater

Coates Heater

Coates PHS Series Electric Heater 3 Phase 54kW 480V

34854PHS-4

$3460³⁶

1

Coates 34836PHS-3 PHS Series 36 kW 480 V three phase electric pool heater

Coates Heater

Coates PHS Series Electric Heater 3-Phase 36kW 480V

34836PHS-3

$2921⁶²

1

Coates 32015CE CE Series 15kW 208V three phase electric pool and spa heater

Coates Heater

Coates CE Series Electric Heater, 3-Phase, 15kW, 208V

32015CE

$2050³¹

1

Questions and answers

What people ask about this product, answered by our pool techs.

What does the limit switch actually do?

It is the overtemperature safety. If water in the heater goes above the switch point, the limit switch opens and cuts the heater rather than letting it keep firing.

Is this the same as the thermostat?

No. The thermostat controls the temperature you set. The limit switch sits behind it as a safety cutout and only acts when something has gone wrong.

Which heaters does it fit?

It is listed for use with Coates electric heaters.

My heater keeps shutting off, is this the part?

It can be. A limit switch that has aged will trip early and shut the heater down repeatedly. Low flow will do the same thing, so confirm flow before you replace the switch.

Ask your own question