Hi, Does anyone here have information about the old 640? I'm planning to install a new thermocouple for it but can't find any info anywhere? Thank you for supporting!
If you are looking for the instructions, here is the link: download/Install%20and%20Repair/A91413%20Replacing%20Short%20Thermocouple%20in%20Legacy%20Controller.pdf
If you are looking to purchase a new thermocouple, please call us at 877-409-6337 option 2.