Came home to 88* so I shut off furnace @ fuse-box. Last night we turned on... & it shut off on its own. We had changed the t-stat, but to no avail... it did not re-set itself. It has power going to, but not coming out. It is a Coleman Presidential II Central Electric Furnace. Model# 3112B750. Code & Serial #087963453. Volts/Hz./Phase: 240Vac/60/1. Anyway of getting a manual, or does anyone know what I should do next... "or my husband do next, should I say." Thank you for any help!!