Last Activity:12-31-2010 2:40 AM
Posted in thread: switching transformer hum normal? on 12-17-2010 at 10:30 PM
Thanks. since I have two db levels of hum I would say one is abnormal.I am assuming you are
saying these can go a long time with a loud hum and still work.Still it is annoying to hear it
through the f...
Posted in thread: Hi on 12-17-2010 at 09:25 PM
My name is Mark from NJ and I am a DYIer. I just posted a question in the HVAC section had hope
to find help from those who know.
Posted in thread: switching transformer hum normal? on 12-17-2010 at 09:23 PM
I have an older furnance with a Honeywell RA 89a 1074 switching transformer that has a loud hum
at times at other times a low humWhen I hear the loud hum the system still works and if I turn
off the p...