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Re: heater doesn't work
You can purchase heating elements for this fan that will solve the problem. This is a fairly new fan model so I would recommend calling Nutone because this model has a three year warranty. They may send you the part you need for free.
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that normally means that the fan motor is getting hot .. there is a thermal protective switch on some fans and on all heater/fans ... some protective switch designs allow the switch to reset when the motor has cooled. that allows the fan to come back on but if the problem is not resolved then it just gets too hot again .. in the case of a space heater then low or blocked air flow will overheat the heating elements .. that will likewise trip the thermal switch .. if you have just a fan (not a heater/fan) then chances are the motor needs oil in its bearings .. check to see if it spins freely .. if not than lub with a good light weight oil like sewing machine oil .. dont use oil containing teflon or other such additives .. that is only for bigger motors and will cause very slow start up in small motors .. make sure there is no dust stopping air flow thru the motor ..you can blow that out with canned air from any hardware ..
contact nutone. the problem is that the sensor that shuts off the unit to prevent overheating is too sensitive or faulty. nutone website seems geared towards selling their product so you may have to call them direct at 1-888-336-6157. this is customer support. good luck.6-6157
Yellow wire is light. Blue is vent. Red is heat element and fan after going through a circuit breaker and thermostat. Brown is night light. White is common to ventilator housing. Black is power to switch cluster.
okay three wires into switch box? hopefully.
it will need a 25 amp breaker at the panel, remove the one in the panel and take it with you to the hardware store get a 25 amp replacement.
the conduit that runs the old fan should be sufficient or use 16 gauge conduit.
okay locate your power in wire conduit with tester.
now all the white neutral wires go together
take the black power wires and install it to one side of the switch
make a small jumper wire and that must go from the black wire you just installed to the same side of the next switch.
the two black wires coming down from the ceiling go to the empty side of the switches, one wire for each switch.
depending on what you want, you can use a standard 240 volt wall heater thermostat for the ceiling heater or just use a switch, since those are just mostly used for when your in the bathroom.
if you only have one wire coming down from the fan your going to have to go up in the attic and fish a new wire for the heater and night light
nutone makes a special three switch setup for one box for that fan, you might want to buy that, it may come with a wiring diagram too.
any questions write me back, your setup may be different..
ground wires all go together and are green or arent insulated
be careful , take time
There's probably a thermal switch in the fixture which turns the fan on when the lights are on for a period of time and heat accumulates in the fixture. It sound like the heat from the attic is setting off the thermal switch. When the attic heat drops, the fixture works correctly.
This is a catch 22 situation, because if the upper housing in the attic is insulated from the attic heat, the insulation will prevent heat dissipation from the heat generated by the fixture's light bulbs. So, for safety reasons, the upper housing should not be insulated.
I'll need to work on this to come up with a fix.
Initially, I am inclined to suspect 3 possibilities:
sticking relay contacts (if used) (a possibility, least likely);
dusty thermal sensor/switch for the fan (likely);
time delay. design feature, will power down the fan only after a certain period that the heater has turned off. This is to dissipate residual heat not only on the heater but on the immediate surroundings of the heater element (most likely).