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Thermal Zone
Central Air Conditioner

Model # CH18M-1S Official Thermal Zone 12 seer split-system heat pump

Here are the diagrams and repair parts for Official Thermal Zone CH18M-1S 12 seer split-system heat pump, as well as links to manuals and error code tables, if available.

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Model diagram and schematic

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Showing 10 of 29 parts  |
Central Air Conditioner Dual-motor Run Capacitor 620777
#17

12 seer split system heat pump diagram

Central air conditioner dual-motor run capacitor

Part #620777

The manufacturer no longer makes this part, and there's no substitute part

Accumulatr 668793
#8

12 seer split system heat pump diagram

Accumulatr

Part #668793

The manufacturer no longer makes this part, and there's no substitute part

Fan Motor 621305
#22

12 seer split system heat pump diagram

Fan motor

Part #621305

The manufacturer no longer makes this part, and there's no substitute part

Fan Blade 667211
#23

12 seer split system heat pump diagram

Fan blade

Part #667211

The manufacturer no longer makes this part, and there's no substitute part

Reversing Valve 668766
#3

12 seer split system heat pump diagram

Reversing valve

Part #668766

The manufacturer no longer makes this part, and there's no substitute part

Outdoor Coil (formed) 499530
#12

12 seer split system heat pump diagram

Outdoor coil (formed)

Part #499530

The manufacturer no longer makes this part, and there's no substitute part

Defrost Sensor 626342
#13

12 seer split system heat pump diagram

Defrost sensor

Part #626342

The manufacturer no longer makes this part, and there's no substitute part

Muffler 668710
#4

12 seer split system heat pump diagram

Muffler

Part #668710

The manufacturer no longer makes this part, and there's no substitute part

Distributor Assembly 663578
#9

12 seer split system heat pump diagram

Distributor assembly

Part #663578

The manufacturer no longer makes this part, and there's no substitute part

Low Voltage Divider 258791
#15

12 seer split system heat pump diagram

Low voltage divider

Part #258791

The manufacturer no longer makes this part, and there's no substitute part

Symptoms for upright freezers

Why does my freezer have a sheet of ice at the bottom?

Main causes: clogged or frozen defrost drain tube…

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Repair guides for upright freezers

How to replace a freezer door switch

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…

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Repair difficulty
Time required
 15 minutes or less
How to replace a freezer thermistor

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…

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Repair difficulty
Time required
 45 minutes or less
How to replace a freezer evaporator fan

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…

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Repair difficulty
Time required
 45 minutes or less

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Maintaining your air conditioner

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How to prevent the 2 most common AC failures from ruining your summer

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