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Just had a new roof installed. Installer found that Ventilaire kit was disconnected. He re connected it and a fan has been blowing off and on. He went up to check it and says he can turn the control one way or another but nothing tells him which setting he should use.

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Hello Can try 110*f-120*f should be good for a attic.

Posted on Oct 15, 2010

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I have a heat pump and it the outside unit seems to cut on and off a lot especially when it first comes on.


Not normal at all. Is it a new system that the installer is having trouble with. Is it a high efficiency heat pump(16seer and up?) The compressor is cycling due to a malfunction. If the installer is fustrated , they might start changing parts just to see if they can problem solve by not locating the problem. This is the difference between installer and a service technician! Ask if there is a service man available to help unless the installer is a qualified tech also, BIG DIFFERENCE! Compressor usually will "short cycle" due to a low freon charge, high amperage, improperly installed components such as a start assist kit(can cause high amps), fault at the start kits potential relay(high amps), wrong or poor supply voltage, closed pump down valve(s), damaged copper tubing inside the unit or at copper line set that comes from your house, fault at expansion valve or restricted orifice if it doesn't have an ex. valve(will cause high pressure), restricted filter drier, miswired or wrong set up(if high efficiency). The o.d. fan is probably controlled by high pressure and will not engage until it reaches a certain pressure so if its not working until the comp cycles 10-15X its probably not a high psi fault. High(excessive) amperage or a low pressure issue. If its low on freon a low pressure switch will stop the comp, the pressure will internally equalize and that will allow the low pressure switch to reset, starting the cycle again. I've seen the heat pumps reversing valve fault on a new system before(3 days used) but that's rare. With the info given that's all I can imagine. Just make sure a service tech is on the job. I had to help the installers many times. They know how to install and start, but a service tech knows, is supposed to know, how to troubleshoot and "fine tune". If the installer don't have help, or a boss who can help, call someone else or just be patient. We all see new issues that we are dumbfounded by.

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1 Answer

Tradewinds VCH-6 and ventilator VR1000 on the roof, motor and fan blows but no suction


It's possible you have a motorized damper or fire damper in there. Likely at the ceiling. Or the duct has come loose. I would think if a damper was closed that fan wouldn't be blowing much air. Good Luck!!

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Have a car audio installer disconnect the mute wire and properly install the unit through the front speaker wires.

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Our fan on our brivis evaporative cooler is not working. The pump to fill it with water is working and the fuse is fine. what else could it be - the unit is on the roof and I can not get to it.


there is a fan insert with a part Number 17517 this insert sits on the shaft of the motor. my fan is working but not blowing so i went up on to my roof and found out that this particular insert is broken (due to a birds nest )

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2002 Xterra SE. The sun roof leaks water when it rains. it leaks around the right front corner of the sun roof, above right sun visor on passenger side. I inspected under the sun roof and I did see...


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My Panasonic FV-11VQL2 seems to have the damper stuck in the closed position. The fan does not exhaust well, ever since we got a new roof (vent and 4" duct too). Any way to unstuck it without going into...


Hubby went into attic. The roofer did a poor job installing the new 4" duct and roof vent; duct was poorly attached and pinched at both ends. He redid both connections, and now the fan works well----no more foggy, drippy mirrors!
So, the fan is fine------the installation of the new roof vent and duct was shoddy.

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First remove radiator fan shrould.This will give you access to the fan.Remove fan and fan belts.Remove bolt on harmonic balancer.You will need to rent a balancer remover and installer kit.Most big auto parts chains will rent these kits to you.Next remove four bolts holding pulley to balancer.Next attach balancer puller to balancer with long bolts from kit.Using a 1\2 drive breaker bar,remove balancer from engine.After removing balancer replace front seal.Lubricate hub on new balancer with engine oil.Then use installation tool from kit to install balancer.Never try to beat balancer on with hammer,engine damage could occur.Then work in reverse to replace remaining parts.Hope this will help you.

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Fan switch not work - Viking 3048SS brand new range hood


There is the on off switch and the blower control that controls the speed of the fan. It is more than likley the blower control that would need replaced.

There could also be a wire disconnected in the hood.

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