If you take off the control console, instructions (including troubleshooting) should be in there. First thing to check is heating coil, followed by thermal fuse. After those, the heat setting knob is connected to a relyay that should be checked. Next, check the high-limit thermostat, then the low-limit. After all of that, check the heating coil and thremal fuse again, finding that one of htem was the problem in the first place, call your local hardware store with the part number, have them special-order it, kick yourself, and have a beer.
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