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Model # MT3QC042 Official Nordyne heat pump
Here are the diagrams and repair parts for Official Nordyne MT3QC042 heat pump, as well as links to manuals and error code tables, if available.
By Schematic
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Browse Parts for
MT3QC042 Heat Pump
#2
Heat pump diagram
Compressor
Part #914656
The manufacturer no longer makes this part, and there's no substitute part
#NI
Heat pump diagram
Distributor
Part #663581
The manufacturer no longer makes this part, and there's no substitute part
#18
Heat pump diagram
Cap strap
Part #258780
The manufacturer no longer makes this part, and there's no substitute part
#NI
Heat pump diagram
Thermostat
Part #626520
The manufacturer no longer makes this part, and there's no substitute part
#23
Heat pump diagram
Condenser motor
Part #621912
The manufacturer no longer makes this part, and there's no substitute part
#16
Heat pump diagram
Contactor
Part #621661
The manufacturer no longer makes this part, and there's no substitute part
#NI
Heat pump diagram
Defrst therm
Part #626342
The manufacturer no longer makes this part, and there's no substitute part
#NI
Heat pump diagram
Connector
Part #663394
The manufacturer no longer makes this part, and there's no substitute part
#6
Heat pump diagram
Coupling bulkhead,large
Part #663619
The manufacturer no longer makes this part, and there's no substitute part
#19
Heat pump diagram
Furnace electronic control board
Part #917178
The manufacturer no longer makes this part, and there's no substitute part
Symptoms for upright freezers
Main causes: clogged or frozen defrost drain tube…
Repair guides for upright freezers

How to replace a freezer door switch
When the door switch fails, the freezer can’t detect that the door is closed. Follow the steps in this repair guide to r…
Repair difficulty
Time required
15 minutes or less

How to replace a freezer thermistor
When the thermistor can’t sense the freezer temperature, the freezer is colder or warmer than the set temperature. Follo…
Repair difficulty
Time required
45 minutes or less

How to replace a freezer evaporator fan
Air won’t circulate to cool the freezer properly when the evaporator fan fails. Follow these step-by-step instructions t…
Repair difficulty
Time required
45 minutes or less
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