2013년 12월 16일 월요일

About 'fan motor'-How does a blower motor resistor work







About 'fan motor'-How does a blower motor resistor work








Remember               when               you               first               installed               your               "ultra               quiet"               Bathroom               fan?

You               could               barely               hear               it               whisk               away               moist               air               and               odor,               right?

Fast               forward               a               year               or               two               and               your               fan               is               probably               as               loud               as               the               box               fan               you               grew               up               with               as               a               child.

Don't               worry.

There               are               two               very               simple               methods               of               cleaning               out               your               old,               noisy               bathroom               fan               that               could               possibly               present               an               alternative               to               replacement.

One               is               very               easy.

The               second               is               a               bit               more               tricky.

Very               Easy
               Both               of               these               methods               for               cleaning               the               bathroom               fan               involve               removing               the               decorative               plastic               shroud               covering               the               motor               of               your               fan.

There               are               only               two               or               three               ways               these               are               manufactured.

Remove               the               shroud               by               prying               the               shroud               (at               one               of               the               corners)               away               from               the               ceiling.

At               this               point,               you'll               see               how               the               shroud               is               attached               to               the               metal               motor               housing.

After               removal               of               the               shroud,               place               the               plastic               shroud               into               a               5               gallon               bucket               of               water               mixed               with               either               vinegar               or               ammonia.
               Assess               how               dirty               your               bathroom               fan               is               by               peering               into               the               metal               motor               housing.

Along               with               common               dust               and               dirt,               you               could               also               see               excess               oil               and               grime               from               the               moving               parts               of               the               fan.

Clean               out               all               loose               dust               and               dirt               with               a               standard               garage               or               house               vacuum.

If               your               fan               is               located               directly               above               your               bathtub,               take               the               necessary               safety               precautions               to               avoid               shock.

After               the               dust               is               removed,               clean               the               oil               around               the               motor               with               at               paper               towel               or               q-tips.


               Insert               the               plastic               fan               shroud               back               onto               the               metal               housing               and               turn               the               bathroom               fan               on.

In               most               cases,               this               simple               task               will               make               a               noticeable               improvement.
               Moderately               Easy
               Another               method               to               clean               your               noisy               bathroom               fan               includes               many               of               the               steps               taken               in               the               first               example               above.

This               time,               take               an               additional               step               by               removing               the               motor               from               the               housing.

Before               attempting               this               repair               yourself,               assess               your               comfort               and               skill               level.

If               necessary,               contact               a               local               contractor               to               assist               you.
               To               remove               and               clean               your               bathroom               fan               motor,               remove               the               two               or               three               screws               holding               the               motor               to               the               metal               housing.

With               the               bathroom               fan               switch               turned               off               and               the               circuit               breaker               for               the               fan               off,               separate               the               electrical               connection               within               the               housing               to               the               motor.

At               this               point,               the               motor               should               easily               exit               the               metal               housing.
               Take               the               motor               into               your               garage               or               basement.

If               you               have               an               air               compressor               with               a               blower               attachment,               use               it               to               blow               compressed               air               into               the               copper               coils               of               the               motor               and               the               outer               motor               shroud.

If               you               don't               have               a               air               compressor,               a               vacuum               cleaner               will               work               just               fine.

After               a               thorough               cleaning,               insert               back               into               the               motor               housing.

Before               turning               the               circuit               breaker               on,               make               sure               to               double-check               your               electrical               connections               for               accuracy.

Replace               the               plastic               shroud               and               turn               fan               on.
               Even               if               you               perform               these               tasks,               you               might               find               that               replacing               your               fan               motor               is               inevitable.

More               often               than               not,               cleaning               your               noisy               bathroom               fan               using               these               methods               will               either               prevent               replacement               or               extend               your               bathroom               fan               motor               by               several               months               or               years.






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