The motor blade to the central A/C unit turns constantly even with the thermostat turned off. It turns fairly slowly. The motor was replaced just last year. The heater comes on normally and produces heat.
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Hi, I am not sure what kind of system you have but I can help you and tell you why this happens. This is the blower motor, and you also have a return air side on the front of the unit. The air is pulled back through the motor, that the filter doesn't catch, and collects on the blades. This takes place over time. If this is a window or wall unit, you may be able to turn off power and reach in with a brush of some kind to break loose this dirt. What happens over time is the dirt will collect on the windings of the motor causing it to overheat, so you want to clean this the best that you can. Even if you had a small air compressor it would be hard to get the dirt off the blades, but would be good to blow out the loose dirt. If this is a central air unit, you can remove 2 screws in front and slide the assembly out and clean the blades this way. So, find a way that is easy for you and clean as best as you can. Be sure you change your air filter on a regular basis. Please don't forget to rate me on this as I know you will be kind. Please keep me posted if you need my help. Sincerely, Shastalaker7 A/C, & Heating Contractor
Okay did you check your thermostat to see if you have the fan switch on auto? The switch must be on auto or the fan will continue to run. If the thermostat fan switch is on auto then there is a malfunction in the thermostat probably. You can go to your forced air unit and on unplug the unit. That way it will not turn on at all, because the forced air unit is controlled by the thermostat. Hope this helps.