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I just replaced the heater unit due to an Error Code 73. I am now getting an Error Code 91 some kind of communication issue.

Model Number
EIMED60JIW0
What have you tried so far?

Checked all of my connections and everything seems to be reconnected correctly.

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Hello
The E91 is a communication Error . See the technician diagnostic sheet link below. Run the unit through diagnostics to verify the stored error code or codes.
Possible causes
1) Wiring, Electronic Control Board.
2) Interface Board defective.
Check connections between Electronic Control Board and Interface Board. If no
wiring problems, replace Electronic Control Board first then Interface Board if EOC does not work. Matt Ace technician

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