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It's a frequent problem for Honda Accord climate control to experience issues where the mode buttons and temperature controls become unresponsive. Another common issue is when the knobs on the center display and air position levers suddenly stop working, possibly due to a faulty climate control module. In some cases, the climate control module wiring harness or wires may need to be fixed or replaced through re-soldering. Alternatively, problems may arise from a malfunctioning Pilot's blower motor resistor or a blown fuse causing climate control failure. To diagnose HVAC problems, it is suggested to check fuse #30 located under the dash panel. Replacing the climate control module typically costs between $207-$250 including parts and labor, while replacing the blower motor resistor averages $180-$220 in parts and labor.
There are several typical causes for the climate control system in a 2020 Honda Accord to malfunction, such as a blown fuse, faulty wiring, or a blocked cabin air filter.