Endurance Pro EI Type Isolation Transformers PRI.120/208/240 V AC 50/60Hz 24 V AC 40 VA Class 2 Control with Foot Mount Replacement for Jard 4031F HVAC Furnace Multi Tap Packard 42440 Gemline GT446

Easy to install and worked as it should for application.

Ordered to repair A/C unit. Replaced the transformer and the unit now working. Order another one for a spare.

My a/c blower would 't start...and eventually I could smell plastic burning. Having no idea, I did some quick googl'ing. Determined it was likely the transformer, which I removed from the board (it smelled like the culprit; and also looked to be "cooked"). I knew it was 115/24, 2 wire in and 2 out. So, I rolled the dice and purchased this. Wired it up and attached to the unit (not the exact same size; but anyone with a brain can figure an alternate work-around). Turned the power on expecting disaster. Nope, it worked perfectly. All is well. Heat is back on.

After moving connectors from original, this transformer is nearly a drop in replacement for our Pentair Sta-Rite Max-E-Therm pool heater. Keep in mind the 208 volt lead is not used here and is not connected to anything.

Goodman air handler already had a aftermarket transformer installed, fan would not come on intermittently. This was a third the cost of an original replacement. We went for it and it works just fine. Inexpensive fix for my 24yr old central ac that blows colder than the new junk.

This is the 4th one we’ve ordered. We ate it on the first two but retuned the last two. Not sure why this keeps happening. The 350 won’t work

I actually used this transformer on a Royal Vending machine. The OEM replacement (which they no longer make) is nearly $150. This transformer did the trick.Well built and has been working for several months.

Great and easy replacement for my 10 yr. old Carrier OEM transformer. Working great!

Perfecto