I have an original Will McLean Oil furnace and a plumber told me that they came with
A lifetime guarantee and if anything goes wrong with the boiler, it is replaced at no charge by the company. Does anyone know if this is true? Does anyone know how to contact the company because I cannot find information about them on the internet?
Thank you,
Chris

It would be best for you to contact the manufacturer to verify the warranty. Warrants were available for 5,10,20, and 25 years. There could have been a lifetime to the original owner. You will need your original receipt from the purchase of your unit to prove ownership. BTW the only warranty available was for the heat exchanger that was extended and they do not pay for any labor.

Post the full model number and serial number, as well as aprox date of install and I'll tell you what the original warranty covers...