What does Comfort Zone II Error Code E5 mean?

The E1 error code on a Comfort Zone CZ220 heater indicates a problem with the high-temperature limit switch. This switch is a safety feature that shuts off the heater if it overheats.
To clear the error code, you can try resetting the heater by unplugging it from the power outlet and waiting for at least 30 seconds before plugging it back in. If the error code persists, it may indicate a more serious issue with the heater that requires professional repair.

Question edited for clarity and spelling.

Disconnect from the mains supply for an hour and then fully reprogram.

https://www.google.com/search?q=Comfort+II+thermostat+changes+all+the+zones+to+%22out%22

COMFORT ZONE II - E. Smith Heating & Air Conditioning

https://esmithair.com > uploads > 2015/03 > Comf...
PDF
From the normal operation mode, press the Hold, Out, and All Zone buttons in that order to program all zones to an unoccupied status. Until you return, the air ...
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Make sure the unit is clean. Especially, the blower wheel. If that doesn't resolve your error code then follow these instructions.
http://screencast.com/t/RoXS239ndAhF
Look that over please, you can clean the blower wheel at the red arrow, jumper the two switches at the blue arrows as *brief tests only* just to see if the unit runs and begins to heat with the jumpers in place.
If it runs, replace the item that failed open.
If it does not run, the control module, Item 5 marked with green is most likely bad and needs to be replaced.

A05 code is over heat error, unit has to be cleaned thoroughly. take unit apart and clean, I use a rag,brush,vacuum and compressed air. .
press the helpful button and check links below on disassembles.

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Hi Anonymous,
For all wall mounted and Artcool split system codes

Error code = C1 or CH1
Flashing Light = 1
Fault = Indoor temperature sensor open or closedcircuit.
Display = Indoor.
Indoor Operation = ON

Error code = C2 or CH2
Flashing Light = 2
Fault = Outdoor temperature sensor open orclosed circuit.
Display = Indoor Outdoor.
Indoor Operation = ON

Problem
Overheat of inverter compressor motor

Cause
Shortage of refrigerant amount Leakage of four way valve
Defect of connector contact

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

I reset the circuit breaker to the panel and everything is good now.