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Why is my 24 volt transformer buzzing very loud all the time ?

Switching it on and off

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  • Contributor
  • 15 Answers

Transformers usually do that, but if it is in an area with moist, humid air or its old then you should replace it.

Posted on Dec 11, 2014

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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  • 234 Answers

SOURCE: AC Control Transformer keeps failing.

well it has blown the fuse on the transformer, then you have coil switch bad.It could be the coil on the contath in for cooling.But can check by taking the yellow wire a loose and see if the don't blow. The red wire is one side of the transformer and the com could be any color.But look at the red wire because it is the main wire that travel the voltage throuhg the unit.

Posted on Mar 26, 2009

t1m130
  • 86 Answers

SOURCE: Blown Transformer heat pump

blown transformers are usually from a low voltage short the first thing i would do is wire a automotive or resetable 3amp fuse in line with the transformer so you dont blow transformer after transformer the wire coming off the transformer that say 24v take that wire a couple of inches down and cut it and install the fuse in series there
24v----------------
24v----------x----------
24v--------{3ampfuse}----------

now you can go through your low voltage wires one by one and test them unhook all the wires to your outdoor condenser at your indoor unit(furnace or airhandler) and try turning it to cool now if you blow the fuse the short is between the tstat and the indoor unit if the fuse is still good leave it on cool and hook up one wire at a time to your outdoor unit starting with R a lot of times your contactor or your defrost board will short out on you also look for pinches in wires wires with cracks in the insulation and wires touching metal this situation can be a real pain sometimes i would recommend calling a hvac company if you start to get stumped
hope this will help you

Posted on Jul 26, 2009

guru_fixya
  • 944 Answers

SOURCE: I need a wiring diagram

Hi,

This is the only site which provides wiring diagram related to Coleman.

Coleman does not provide any online diagrams...

http://colorcodes.flagsolution.com/colemanwiringcolorcodes/


For 24 volt transformer:
http://www.google.co.in/images?um=1&hl=en&biw=1912&bih=825&tbs=isch:1&aq=f&aqi=&oq=&gs_rfai=&q=coleman%2024%20volt%20transformer%20wiring%20color%20codes

For RBM relay:(Common not specific to Coleman)
http://www.google.co.in/images?um=1&hl=en&biw=1912&bih=825&tbs=isch%3A1&sa=1&q=RBM+relay+wiring+color+codes&aq=f&aqi=&aql=&oq=&gs_rfai=

Hope this can help you.

post a comment for further assistance.
Thank you for using fixya have a nice day:-)

Posted on Sep 01, 2010

heatman101
  • 43501 Answers

SOURCE: no voltage from 24 volt transformer power in no

Hi,
The transformer is burnt out... you will need to replace it... this is common and they burn out easily if a low voltage wire it shorted even for a split second, or if there is a brown out...

They best way to prevent this is by installing a 5 amp fuse ahead of the transformer in the high voltage line so that it blows before the transformer goes...

heatman101

Posted on Sep 08, 2010

  • 1033 Answers

SOURCE: what are the tolerances of

Hello, a 24 volt transformer can handle a tolerance of about 10% or just a little under. The important thing to remember about transformers is to always replace one with the same VA rating ( VOLT-AMPERE)

Posted on Feb 18, 2011

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by doing this if the fan motor operates you know that the High voltage & the low voltage (24 volt control power) are present.
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