The thermostat panel went blank while the furnace was on. Now, it is blowing cold air. How do I turn it off, and what can it be?


There should be a service switch near or on the unit that you can turn off, or at the breaker. It sounds like a short, but I'm not sure where.

Updated on March 8, 2018

Original Article:

Troubleshooting Common Furnace Problems With an HVAC Expert
By Dan Robbins