I tried my furnace, the other day. The inside temp was 60 degrees. The furnace started as soon as I moved the thermostat up to 10 degrees. The furnace ran good, but when the temp hit 70, where the stat was set, it didn't shut off. The temp was nearing 80 degrees, and I shut it down. Would the thermostat be bad, or sticking? I took the cover off, in case there was some dust on a bug in there, but didn't find anything. The trailer is an 09 Cherokee, 39L. Thanks