Carrier 40MFC - Page 25

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5 --- Evaporator coil temperature sensor Open or short circuited --- diagnosis and solution (E5)

Error Code E5

Malfunction conditions If the reading voltage is lower than 0.06V or higher than 4.94V, the LED will display the failure.

Possible Causes

• Wiring mistake

• Defective sensor

• Defective PCB

Trouble shooting:

Check the connections

between temperature

sensor and main PCB.

Are the connections

good?

Correct the connections.No

Yes

Replace indoor or

outdoor main PCB.

Replace the sensor and

check if the problem happen

again?

Check the resistance value

of the sensor. Is it normal?

A14485

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