Model #867765930 KENMORE Furnace/Heater, Gas

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Question and Answers


How do I install replacement part 3F05-3 being used as a substitution part for 90653 on my Sears HVAC unit?


I recommend that you have a technician install this part. Looking at the wiring diagram for this model, it appears that the original auxiliary limit control part has a red, blue and yellow wire attached to it. The yellow wire went to the fan. It is likely that the yellow wire is not needed. The technician will likely connect the blue and red wire and then seal the end of the yellow wire with a wire nut and dress it out of the way. The wiring diagram shows another thermostat in series with this auxiliary limit control. That thermostat may need to be replaced as well. Since the wiring of this component will need to be revised, this is the reason that I recommend having a service technician install it.

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Lyle W -
Sears Technician
September 05, 2009