This is a good used Lennox OEM Transformer. 115 volt in and 24volt out (40VA). Lennox part # 42J3201. Products Unlimited Corp. part # 4000-01V188808. Bassler part # BE162640GEK 002. It was tested and works perfectly.

THIS IS AN OEM UPGRADE REPLACEMENT FOR THE LENNOX 78H5501, 78H55, 4000-01M048808. 

If you need this Transformer, you may need it fast. We will ship immediately after payment clears. Contact us if you have any questions.

If any shipping options are chosen other than our free shipping, those funds will not be refunded for any reason if the part is returned. 

We will warranty this part