Transformer for M2 and M3 series furnaces. 120V input (load), 24V output (line). 40VA, 50/60HZ.
Replaces 620688, 620776, 620860, 621440, 621079, 621329, 621486, 621486R, 104445000 & DUB20054401.
We have a large selection of furnace parts manuals / wire diagrams online.
To help you look up your part number by model number. Click on Furnace Parts Manuals then use Control and F to search your model number. ctrl+F
Need Help??
1 Year Warranty on ALL parts!