Check for a clog in hoses or wand, your motor is trying to cool itself, in that effort apparently there is limit good air getting to the motor. Clean filters, change bag, unclog hose. If your thermal coupling is now bad, you may have to replace or remove. this is the item the manufacturer has installed to keep you motor from burning up from over heating.
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Check for a clog in hoses or wand, your motor is trying to cool itself, in that effort apparently there is limit good air getting to the motor. Clean filters, change bag, unclog hose. If your thermal coupling is now bad, you may have to replace or remove. this is the item the manufacturer has installed to keep you motor from burning up from over heating.