My atic ventilating fan is not working. This is our first summer in this house. The fan has a thermostat on it and when I bypass the thermostat the fan does come on. It has been pretty hot here (90 F) so I would think that the fan should be turning on. Could the thermostat be faulty? Can I get parts?
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Re: atic ventilating fan
If you are bypassing the t-stat and it is running I would say most likely that the t-stat is your problem. I would need more info on this device to see what options you would have for a t-stat controller.
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You didn't say what kind of system you have, so we'll assume you have central heating and air conditioning.
There are a few things you can do to keep air moving in the house with your central system. Depending on the brand of system you have, you can turn the heat/cool switch on the thermostat to "off" and turn the fan auto/on switch to "on." This will disable cooling and heating but allow the fan to run continuously.
You can turn the thermostat up to a temperature far above what you would normally use in summer and turn the auto/off fan switch to on. This will force the fan to run continuously. The cooling will still work when the temperature in the building exceeds the higher set point.
These steps will work on most systems but if you have one of the new "NEST" or other internet-connected temperature control systems, you can refer to the operating instructions to see what your options might be.
Note that leaving the fan on all the time will result in higher electrical costs, more wear and tear and you may have to clean or change the furnace filter more often.
You might be better served by purchasing a free-standing floor type "tower" fan and placing it in the room you are in most frequently.
You should check the thermostat. There must be a sensor connector on the thermostat housing. If you bypass that connector and the fan runs, then the thermostat is damaged and needs to be replaced. If you follow the radiator hose you will reach the thermostat housing.
Running the equipment on 72 degrees would cause the compressor and fan to work harder on hot days. This will definitely place more strain on your capacitor. These capacitor problems usually happen on the hottest days. I would suspect the capacitor, not the fan. I'm an HVAC tech, so I would Check both with my multimeter
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.
The heat sensor or thermal switch can go bad, so can the motor.
Try a few things;
shut off power going to fan. try cleaning out the thermostat housing using some compressed air on low pressure, or use a vacuum cleaner on blow, or a hair dryer on no heat. you can also spray the inside with contact/motor cleaner(home depot electric dept.) and then blow the thermostat out of any dust or particles that may have lodged inside.
To see if the thermostat works at all, turn power to fan on. Take a hair dryer on heat and place near thermostat - to see if fan comes on.
To rule out a bad motor, the thermostat can be bypassed by hooking up the feed wires to the fan itself, if you're handy with wiring.
Ventamatic web site does list replacement parts for fans... Good luck!
Radiator has inlet and outlet, top side of the radiator is outlet and boton side you have pipe that is inlet pipe so you can get thermostat on the top side where outlet pipe fited remove the pipe then remove the some polts on the thermostat housing.when you fitted new thermostad dont forget to put new gasket atherwise it will leaks.