Review on Honeywell AT72D1683 Transformer Multicolored by Randy Bin

Works - sort of. The output voltage is about 10%-15% too high at the nominal input voltage of 120VAC. If your utility increases the voltage on its power line during the day, the output voltage will be even higher than the 10-15% it is already generating. I suspect this is due to a lack of quality control of production at a factory in the Far East. Also, one of the output terminal screws was stripped and could not be tightened on the oven control low voltage wire. I had to disassemble the output side of the transformer and redo the mechanical arrangement of the bolts, replacing them with longer 6-32 machine screws with wing nuts to secure the wires. With this modification, the Transformer is now a mechanical copy of the 70-year-old Transformer it replaced. Also, the junction box cover that came with the device was too weak to support the weight of the device. Use a standard junction box cover with a cut-out in the middle instead. I contacted Honeywell Technical Support and informed them of the surge situation, the broken screw (as well as my repair) and the weak junction box cover.