So the heater is throwing an LP code after a few minutes of runtime. I think it ran for most of the day without issue. After some reasearch, it appears it could be an airflow issue, low ambient temp, or low refrigerant. When it runs, the exhaust is cold and the water output warm. The ambient temp was 75 so I don't think that's it. Could it be a bad lp switch so it cut out when it was cooler but way above where it should have? Is there a way to verify that it's not refrigerant? I'm wondering if I can fix this or if I should call someone.
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