Results 1 to 3 of 3

Thread: M21 heater loud transformer sound when heater fan kicks on

  1. #1
    Join Date
    Nov 2014
    Thanked 2 Times in 2 Posts

    M21 heater loud transformer sound when heater fan kicks on

    I went through the burn chamber on my spare m21 heater and test fired it earlier. It worked ok so I shut it down. Went to fire it back up and it went into lockout after a few minutes so I reset it. Next time around I got a pretty loud sound like when an industrial electric motor on an air compressor starts up from the relay area. I am thinking that this may have been an issue before I tore down the heater but I just didn't notice it. Is it common for the fan heater to cause this or could it be a board problem? It almost seems like the initial current draw caused the noise. I have some minor experience with power supplies and have seen overcurrent shut down the system before. Any pointers? If I can find my ammeter I would like to do some further tests.

  2. #2
    Join Date
    Jul 2004
    Saint Regis Falls, NY, USA.
    Thanked 481 Times in 468 Posts
    Some induction motors have a thick copper shunt wire embedded with the laminations. This is to lessen the "eddy" currents set up when current is applied. If tghe wire is broken the lamination s will buzz.

  3. #3
    Join Date
    Sep 2014
    Gustavus Alaska
    Thanked 0 Times in 0 Posts
    Does the fan spin free by hand?

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)


Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts