raypak hl2

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    HL2 Code on Raypak r206a

    Hey guys, this season I've been getting an HL2 code on my Raypak 206a heater. I'm aware that this is because the outlet temperature is exceeding 135 degrees Fahrenheit. This happens regardless of the rpm that I set variable speed pump to. However I will note a high pitch squealing sound once the...