I have Carrier Comfort Zone 2 on a York system. Everything has worked fine. After recent lightning strike, the controller is not responding correctly. It flashes E1 alternating with the current temp. No matter what the programming, it seems to start cooling when the house gets to 84-85 degrees inside and then stays on continually until it hits the programmed 76-77. How do I test to see if zone panel or thermostats need replacing?

SOURCE: Carrier Comfort Zone 2 flashing E2

the e2 error on your thermostat is a problem with the return temp sensor on your system, the only thing you can really do is call a company and replace it, you can't bypass it or remove it cause the system wont run properly

SOURCE: carrier Comfort zone 2 is flashing e1 after a storm/power outage

HEY THERE, DID YOU TRY POER CYCLING THE UNIT? TURN IT OFF AT THE BREAKER THEN BACK ON
SETH

SOURCE: thermostat issue with comfort zone II.

Is this an electric or gass furnace - Eather of these can can have this problem its most recomendable that you call a seviceman .
in the case of electric furnace you may requier a new heat sequencer. And in the case of gass you may requier a new relay.

SOURCE: Carrier Comfort Zone 2 Master is flashing E5

Check float switch. E5 is loss of 24 volt power on some models.Russ

SOURCE: We have the same problem, was hit with lightning and came up E1

You didn't get a Carrier tech. Carrier technicians only work on commercial equipment. Residential applicaitions, installation and service of Carrier residential units are done by dealers. They are not carrier owned but get buy the product at discount get training and get to show our logo. You can't fix the boards, they have to be replaced. It sounds like you have a Gen II VVT system. You can get the part via Totaline stores or a distributor. You will need to know how to readdress the other controllers to operate correctly. Use WWW.Carrier.com.