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Why does the 115V-24V transformer keep blowing on my Trane XB80?
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Jeff Thies
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Why does the 115V-24V transformer keep blowing on my Trane XB80?
On 4/4/2011 4:22 PM, Steve Turner wrote:
On 4/4/2011 2:57 PM,
wrote:
On Mon, 04 Apr 2011 09:50:54 -0400, Jeff
wrote:
On 4/4/2011 9:19 AM, Stormin Mormon wrote:
It blows because something is drawing too much current.
Probably not. More likely it just gave up as it was designed too near
the margins.
Jeff
I think it imay be safe to say something drew too much power for THAT
transformer - however - a primary could fail open even if it NEVER had
a load on the secondary (in which case, for THAT transformer, even NO
load was too much.
Lots of REAL crappy electrical "goods" on the market today.
Just picked up a new White Rodgers model 90-T40F3 (input 120/208/240V,
output 24V 40VA) from a local supplier that has a form factor very
similar to the original. White Rodgers also makes the control board into
which the 24V feeds, so hopefully bodes well for it being a proper
replacement.
Good.
Give a feel after it has run for a while to see how warm it gets, you
may wish to do that with other components also, and an IR thermometer
once over if you have one.
Jeff
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