I have Type No. IF86-244 thermostat. The readings became illegible so I took off the cover and saw batteries. Replaced batteries and LED now reads "Low Battery" but still no temps are shown. Heater now will not turn off unless I switch off system completely. What do I need to do? C. Crain

Asked by Connie on 02/05/2012 1  Answer

ManualsOnline posted an answer 12 years, 1 month ago

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