Hayward HAXHLI1930 135F hi-limit switch for H-Series pool heatersHayward 135F Hi-Limit, H-Series In stock$5999
Hayward HAXHLI1930 135F hi-limit switch for H-Series pool heaters

Hayward 135F Hi-Limit, H-Series

Ask a questionAPS # HAY-151-1574
In stock
$5999

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Quick overview

  • Genuine Hayward part The factory HAXHLI1930 hi-limit, not a generic thermal switch.
  • 135F setting This is the 135 degree F limit, so check the rating stamped on the switch you are replacing before ordering.
  • Safety cutout The hi-limit interrupts the heater when outlet water temperature climbs past its setting.
  • H-Series heaters Used across the Hayward H-Series gas heater family, including the electronic 150 to 400 models.
  • Common no-heat cause A failed hi-limit reads as an open circuit and locks the heater out even when the water is cold.
  • Direct replacement Swaps in place of the original switch on the heater header.
Full description and specifications ↓

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Product details

The Hayward HAXHLI1930 is the genuine 135 degree F hi-limit switch for H-Series pool heaters. It is the safety device that watches outlet water temperature and cuts the heater off if that temperature climbs past its setting.

Why hi-limits fail

A hi-limit spends its life in the heater header, cycling with every call for heat. Over the years the switch can fail open, and when it does the heater stops firing even though the water is cold and everything else looks normal. Low flow, a dirty filter or a closed valve can also trip a healthy limit, so it is worth confirming flow before condemning the switch.

Ordering the right one

Hayward uses hi-limits with different temperature ratings, and this one is the 135 F version. Read the rating printed on the switch you are pulling out and match it. It covers the H-Series family, including the H-Series and H-Series ED1 and ED2 electronic heaters in the 150 to 400 range and the Low NOx 250 and 400.

Specifications
Brand Hayward
Manufacturer part number HAXHLI1930
UPC 610377625739
Type Hi-limit switch
Setting 135 F
Part category Pool heater part
Fits Hayward H-Series heaters, including H-Series ED1 and ED2 electronic models 150 to 400 and H-Series Low NOx 250 and 400
Shipping weight 0.2 lb
Ships Parcel

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Questions and answers

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

What does the hi-limit actually do?
It is a temperature safety switch. If water leaving the heater gets hotter than the switch rating, the hi-limit opens and shuts the heater down until the water cools.
Which temperature is this one?
135 degrees F. Hayward uses more than one limit rating, so read the number on the old switch and match it.
Could a bad hi-limit be why my heater will not fire?
Yes. The switch is wired in series with the safety circuit, so once it fails open the heater will not light even with normal water temperature and good gas supply.
Will it fit my H-Series?
It is the Hayward OEM hi-limit for the H-Series family, covering the H-Series and H-Series ED1 and ED2 electronic heaters 150 to 400 and the Low NOx 250 and 400.
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