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Anonymous posted an answer for this Heating & Cooling:
"display on comfortzone 1500 heater reads dofl-won't operate-what is wrong?"
"According to the call line you have to hit the up, down and enter buttons at one time. Did..."
"Infrared Comfortzone heater model #1500P displaying error message doFL. How do I get rid..."
"According to the call line, hold down the up, down and enter buttons all at the same time..."
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