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Raypak 406A Heater And Hl1 Error Code

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It appears that you have located the correct wires. However, before you replace the sensors, remove the wires and reseat them to scrape of any corrosion that may be preventing an accurate signal to the controller. If you still get the error code, then try using a jumper to bypass one sensor at a time. This will allow you figure out which one is the culprit. It will also indicate that the problem is with the sensor and not in the wiring or controller.

Good Luck!

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