Just a day ago my heater posed a problem. It seems that the fan motor turns very slow. As a result air flow has been restricted. I know a fair amout about electric items when I hand turn it , it feels somewhat tight not free spinning. I have never had an issue nor turned the motor before so not sure if it has a problem. But now I do have limited heat !! Any clues out there...Voltage, bad bearings or brushes worn out. Maybe just toss the motor and get another one?????