Have HVAC Questions? Ask an HVAC Expert for Answers
You most likely have a short somewhere in the low voltage control if you heard a buzz and thermostat went blank.If you have test meters I can guide you in troubleshooting.Otherwise you will have to wait for the tech to arrive with tools to troubleshoot and find the short.
If you have further questions, please let me know.
Thanks for letting me work with you.Leaving a poor service rating will not automatically refund your money,but reflects poorly on your expert. You have to request a refund if not satisfied with the information provided being accurate.