new HVAC & door bell quit

didn'tdoit · 04-03-2006, 04:12 PM

Just had new HVAC unit installed and now the door bell quit working, even the light on the door bell is out. Could the door bell have used the transformer on the HVAC. It is a central system furnace inside ac outside. What wiring should I look for to repair it. AC company says never heard of such a thing. Thanks for the help.

didn'tdoit · 04-05-2006, 10:16 PM

Found the problem. The doorbell was connected to the transformer in the old furnace and just not connected to the new furnace... anyone know what terminals to connect the two doorbell wires to? I hate to call the HVAC company to come out just to fix this?

coolmen · 04-15-2006, 01:02 PM

with the new furnaces now a days they use sensitive control boards.adding the doorbell directly to this is not recommended. your doorbell should have its own transformer and probally did, but was installed on the old furnace. You need( 24/120volt transformer) to operate door bell .this will require some one who knows how to install a t-former. tell the hvac co that the doorbell transformer was mistakenly taken with the old furnace and if they would kindly come back and install the transformer
terminal R and C on board. BEAWARE if you damage something or accidentally damage something (they have the right to charge you for service and parts)

didn'tdoit · 04-16-2006, 07:30 PM

Quote:

Originally Posted by coolmen

with the new furnaces now a days they use sensitive control boards.adding the doorbell directly to this is not recommended. your doorbell should have its own transformer and probally did, but was installed on the old furnace. You need( 24/120volt transformer) to operate door bell .this will require some one who knows how to install a t-former. tell the hvac co that the doorbell transformer was mistakenly taken with the old furnace and if they would kindly come back and install the transformer
terminal R and C on board. BEAWARE if you damage something or accidentally damage something (they have the right to charge you for service and parts)

Thank you.