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And "E-1" code is a loss of communication error between the A/C and the thermostat. Most of the time, it is just a problem with some dust or moisture on the cable. Try unplugging the cable from the thermostat first and carefully wiping it down on the contact and then put it back in. They try a reset. If you still have no reading, then do that up at the A/C where the cable plugs into the unit. There should be two as there will be a cable to the other A/C as well. Try that and get back to me if we need to dig deeper into this. All follow ups are included in our fee.
Hopefully, you got this resolved as I didn't hear back from you. You can always return to this posting again if you Bookmark it and we can do a follow up. All part of our service and please take time to enter a rating as that is the only way I get credit for my time spent helping you. Thanks! Be safe........