Yes I did use a 50/50 mix. The problem was the new thermostat, I checked it in water and the 170 deg thermostat started opening at 175 and not 170. I put in a new thermostat that opens at 170 and my problem went away, even down to -20 deg. Thanks jjc
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Thursday, March 11th, 2021 AT 5:57 PM
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