High Limit Switch used on all Viron gas pool heaters. Commonly corrodes on older Hurlcon Astralpool Viron Gas Heaters. May cause the F6 fault on Astralpool & Hurlcon Viron gas heaters. AKA Thermal Cutout. Part number 22 in the diagram.
Hurlcon Part Number 78169
- 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. This is not covered by warranty.
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
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