Dual Motor Replacement and GFI Circuit
I have an 11 year old Nutone CV-450 that has started to run very hot after 5-10 minutes and often trips the 110V GFI receptacle. It does run cooler, however, when on board vacuum port is slightly opened- a temp work around. All 5 wall receptacles have equal and fairly good vacuum ruling out blockage. That said, I'm assuming the unit has two motors one of the two is failing and I should replace both since I have no way to pinpoint the culprit. Your "single" motor replace guide seems straight forward. Is there a reference for replacing two motors which I conclude are top: 116210-85 and bottom: 119412? Thank, Pete, Moultonborough, NH
A central vacuum should not be plugged into a GFI circuit. It causes more trouble and false alarms then good. With the minibreakers on the vacuum tank and the house panel breaker as a back up there is enough protection. For dual motor replacement it is really as straight forward as the single motor replacement so you can use those instructions. We do recommend both motors being replaced because the other "working" motor is always not far behind to fail and you'll be back in there again.