I have taken a couple of the courses that were very good. How do I print my certificate for the course? I need a cert to get my CE credit,called certainteed and they have not got back to me. Anyone else having this problem? Thanks David
I have seen this build up of dirt several times but never this bad. What causes this? This is in a 8 year old furnace that had not been serviced at all. I always just call it out as needing to be evaluated by a HVAC guy. Thanks David Click to Enlarge 43.13 KB