Flue High Limit Switch - 175°C - F6 Error Hurlcon Astralpool Viron Gas Heaters

Flue base 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

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. 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