hausdok Posted November 5, 2010 Report Share Posted November 5, 2010 Hi All, I was on the phone today with Williams Comfort Products trying to nail down their serial number methodology. I didn't have much luck for anything earlier than about 2000. The lady that I spoke to was very resistant to any effort to get her to tell me what years various models of Williams furnaces were manufactured or were termed obsolete. She did tell me that after "about 2000" the serial number code with the letter at the beginning was abandoned and they went to a new method wherein the first four digits of the serial number are the week and the year. As far as older models, all she would do was send me a chart that contains the model numbers of all of their "obsolete" furnaces - furnaces that they no longer supply parts for. At least with that chart, if one of you runs across a Williams furnace older than 2000 you can check the number to see if it's obsolete and can then inform your client that should the thing ever break down finding parts for it will not be easy, if not impossible. I've uploaded it to the library. Here's the link: https://www.inspectorsjournal.com/forum ... oto&id=136 ONE TEAM - ONE FIGHT!!! Mike Quote Link to comment Share on other sites More sharing options...
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