furance on a viking popup

Heh... I'll trade him for one that won't start! 3:-)

Here is the pic of the thermostat:

A picture of the thermostat may help.

If he has the type that only has a slide on the bottom, push it to the left until it clicks.

The only time my furnace was stuck on, the problem was the thermostat. I changed it to a $5 Wally World digital t-stat and never had a problem again.

thank you opnspaces will pass the info to my son!

I would pull the the front off thermostat and disconnect one of the wires. He might have to remove the thermostat entirely to get to the screws holding the wires.

If it keeps running there is probably a solenoid that is stuck in the heater. A smack on the top of the heater with the palm of his hand might dislodge it. If not he'll probably need a repair tech.

T-stat set to heat
OR t-stat is shorted