We have a commercial Goodman furnace (roof top) and it has had many problems through out the last 6 years, since we bought it.
Recently we replaced the blower motor however we are still having problems. Now it seems to have a mind of its own - the heat fluxgates from 71 degrees 9 which is what we have it set at) and 65. And there is no program running.
Any help on this would be greatly appreciated!!