Astralpool Hi Limit 70C - NC Auto

Astralpool Hi Limit 70C - NC Auto

High Limit Switch used in many gas & electric heaters. Common on some Hurlcon & Astralpool heaters. Failed hi limits cause the F2 Errors found on Hurlcon and Astral Gas Heaters. AKA Thermal Cutout

• Physically Stocked, unlike most "drop-shipping" websites.
• Shipped from VIC, NSW, WA, QLD

Used on Outlet for some early Hurlcon & Purex Minimax heaters. Never used in any plastic headers. Automatic Reset. On early Hurlcon HX heaters, the high limit switch had a blue plastic body secured with 2x philips head screws onto a small copper plate brazed onto the heat exchanger outlet elbow. Some newer ones are threaded.

Important Information:
- These are an Extremely Important Safety feature found on heaters. They must be replaced when necessary.
- When installing, make sure both male & female thread are clean. We recommend lightly lubricating the thread, and *gently* screwing them in, as the thread shaft is thin brass. Dirty threads, or over-tightening can break the shaft.

May also be found on JX 130 and JX 160 gas heaters.
Hurlcon Part Number 71032 - Threaded / 71018H - Non Threaded
Purex Pentair Part Number 071017

Other High Limit (Hi Limit) Switches:

42-45C° Inlet Hi Limit (Hurlcon, Astralpool, Raypak, Pentair)
52-55C° Outlet Hi Limit (Hurlcon, Astralpool, Raypak, Pentair)
60C° Outlet Hi Limit AGS (Hurlcon, Astralpool, Raypak, Pentair)
70C° Outlet Hi Limit (Hurlcon, Astralpool)
175C° Flue Temp Sensor (Hurlcon, Astralpool)
Hurlcon / Astralpool HiLimit Locator Brass Threaded Plug

Manufacturer Catalogues, Diagrams & Part Numbers

Need exploded views, spare part numbers, product numbers, diagrams, or more product information? See the manufacturer catalogues: Astralpool Catalogue 2026 | Zodiac Catalogue 2026