How Can I Make the Furnace Work if Thermostat Is Broken?

1. Locate the circuit breaker that controls the furnace. It's usually found in your home's electrical panel. Reset the circuit breaker and see if the furnace starts.

2. Check the power switch on the furnace. Make sure it's in the "On" position.

3. Ensure the gas valve on the furnace is open. If it's not, turn it counterclockwise until it stops.

4. Check the furnace filter. If it's dirty, replace it.

5. Listen for the furnace running. If you can't hear it running, check the fan motor. It may be broken and need to be replaced.

6. Try raising the thermostat setting manually. If the furnace still doesn't turn on, it's likely a problem with the thermostat.

Here are additional tips for troubleshooting a broken thermostat:

- Check the batteries in the thermostat. If they're low, replace them.

- Make sure the thermostat is set to the correct mode (heat or cool).

- If the thermostat has a display, check for any error messages.

- Try resetting the thermostat by turning it off and on again.

- If none of these steps work, you may need to replace the thermostat.

If you're still having trouble, it's best to call a qualified HVAC technician for assistance.