Lennox LIUH018021T431E-1 Service Manual page 134

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Troubleshooting
2.4.4.3 MCE Malfunction
MCE malfunction
MCE malfunction
Power off, then restart the
Power off, then restart the
unit 2 minutes later. Does a
unit 2 minutes later. Does a
problem still exist?
problem still exist?
Yes
Replace the outdoor main PCB
Replace the outdoor main PCB
Electrical Control System
132

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