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ICP
Heating & Cooling Combined Unit

Model # NG4P036A3D2 Official ICP package gas/electric combination unit

Here are the diagrams and repair parts for Official ICP NG4P036A3D2 package gas/electric combination unit, 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 93 parts  |
Transformer 1056899
#3

Control box diagram

Transformer

Part #1056899

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

Contactor 1050699
#2

Control box diagram

Contactor

Part #1050699

Replaced by #94-388

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Manufacturer substitution
This part replaces 1050699. Substitute parts can look different from the original.
$33.20 | 
15% OFF Phone Price : $39.20
In Stock
Module 1005651
#9

Control box diagram

Module

Part #1005651

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

Relay Tm Dly 1054636
#10

Control box diagram

Relay tm dly

Part #1054636

Replaced by #7070

?
Manufacturer substitution
This part replaces 1054636. Substitute parts can look different from the original.
$86.18 | 
7% OFF Phone Price : $92.18
In Stock
Control Fan 1065188
#8

Control box diagram

Control fan

Part #1065188

Replaced by #7070

?
Manufacturer substitution
This part replaces 1065188. Substitute parts can look different from the original.
$86.18 | 
7% OFF Phone Price : $92.18
In Stock
Limit Switch 1005549
#7

Functional replacement diagram

Limit switch

Part #1005549

Replaced by #1013102

?
Manufacturer substitution
This part replaces 1005549. Substitute parts can look different from the original.
$15.62 | 
11% OFF Phone Price : $17.62
In Stock
Furnace Fan Control Relay 1000742
#7

Control box diagram

Furnace fan control relay

Part #1000742

$35.62 | 
14% OFF Phone Price : $41.62
In Stock
Furnace Flue Collector Box 1065256
#3

Functional replacement diagram

Furnace flue collector box

Part #1065256

$111.37 | 
10% OFF Phone Price : $123.37
In Stock
Flame Sensor 612922
#21A

Functional replacement diagram

Flame sensor

Part #612922

Replaced by #1149944

?
Manufacturer substitution
This part replaces 612922. Substitute parts can look different from the original.
$118.36 | 
9% OFF Phone Price : $130.36
In Stock
Valve 1005597
#9

Functional replacement diagram

Valve

Part #1005597

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

Most common symptoms to help you fix your heating & cooling combined units

Choose a symptom to see related heating and air conditioning system repairs.

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Why is my furnace not blowing hot enough?

Thermostat problem, clogged air filter, burner failure…

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Why isn’t my air conditioner cooling well?

Dirty air filter, clogged condenser coils, low refrigerant charge, faulty compressor…

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Why isn’t my air conditioner cooling?

Thermostat problems, bad compressor/condenser fan capacitor, lack of refrigerant, failed compressor…

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Why won't my air conditioner turn on?

Main causes: errant thermostat settings, lack of electrical power, clogged drain line, wiring failure, control failure.…

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Why won't my furnace turn on?

Main causes: Errant thermostat settings, lack of power, bad interlock switches, lack of exhaust ventilation, wiring fail…

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Why won’t my furnace burners won’t stay lit?

Dirty flame sensor, failed flame sensor, damaged burner, bad high limit switch…

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Most common repair guides to help fix your heating & cooling combined units

These step-by-step repair guides will help you safely fix what’s broken on your HVAC system.

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How to unclog the air conditioner drain line

The condensate drain line for your central air conditioner can clog with mold and mildew. Water will back up and start d…

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Repair difficulty
Time required
 15 minutes or less
How to replace the furnace flame sensor

How to replace the furnace flame sensor

The flame sensor detects when furnace burner flames are lit. You may need to replace the flame sensor if flames only sta…

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How to replace a heating and air conditioning system thermostat

How to replace a heating and air conditioning system thermostat

The control thermostat for your HVAC system can stop working. This repair guide shows how to replace it.…

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Time required
 30 minutes or less

Effective articles & videos to help repair your heating & cooling combined units

Use the advice and tips in these articles and videos to get the most out of your HVAC system.

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Maintaining your air conditioner

Maintaining your air conditioner

Learn how to maintain your central air conditioner to keep it running smoothly all summer long.…

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

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