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Universal Heating Controls Overview

Application Model Number Description Replacements

Ignitors 21D64-2 HotRod Universal Ignitor

+ 150

Gas Valves 36C03-333 S.P. Fast Opening + 300

36H32-423 Fast Opening + 450

36H33-412 Slow Opening + 60

36H64-463 Two Stage + 200

36J22-214 Fast Opening +50

36J24-214 Slow Opening +60

36J54-214 Two Stage +60

Non-Integrated Module 50D50-842 Direct Spark + 60

50D50-843 Proven Pilot +350

50E47-843 HSI + 80

Integrated Module 50M56U-843 HSI/SN + 300

21M1U-843 Multi-Stage PSC + 15

21V51U-843 Multi-Stage ECM + 25

14 Models Over 2000 Total Replacements + 2000

White-Rodgers Universal Controls

Model NumberOperating

VoltageMaterial

Direct Flame Sense

Capable

21D64-2 120 V Nitride No

767A 120 V Carbide Yes

768A 80 V Nitride No

Universal Ignitors - Selection Criteria

1. Ignitor Voltage

2. Flame Sensing

Model Number Capacity

Opening Curve Stages

Ignition Source

SP PP DBI

36C03-433 280,000 Fast 1 x

36H32-423 260,000 Fast 1 x x

36H33-412 260,000 Slow 1 x x

36H64-463 260,000 Fast 2 x x

36J22-214 140,000 Fast 1 x

36J24-214 140,000 Slow 1 x

36J54-214 140,000 Fast 2 x

Universal Gas Valves – Selection Criteria1. Capacity

2. Opening Curve

3. Stages

4. Ignition Source

Universal Furnace Controls – Selection Criteria1. Logic

A. Integrated or not

2. Ignition SourceA. Proven Pilot, Direct Spark, Hot Surface Ignition

3. Number of StagesA. Single or Multi-Stage

LogicIgnition Source Stages

W-R Model Number Honeywell Robertshaw

Integrated HSI 120 VAC 1 50M56U-843 S92 n/a

(PSC Blower) HSI 120 VAC 2 21M51U-843 n/a n/a

(ECM Blower) HSI 120 VAC 2 21V51U-843 n/a n/a

Non-Integrated

Proven Pilot 1 50D50-843 S86 DS845

Direct Spark 1 50D50-842 S87 780

HSI 120 VAC 1 50E47-843 S89 HS780

6

Non-Integrated Furnace Control Family

LogicIgnition Source Stages

W-R Model Number Honeywell Robertshaw

Non-Integrated

Proven Pilot 1 50D50-842 S87 DS845

Direct Spark 1 50D50-843 S86 780

HSI 120 VAC 1 50E47-843 S89 HS780

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Integrated Furnace Control Family

LogicIgnition Source Stages

White-Rodgers Honeywell Robertshaw

Integrated HSI 120 VAC 1 50M56U-843 S92 X

(PSC Blower) HSI 120 VAC 2 21M51U-843 X X

(ECM Blower) HSI 120 VAC 2 21V51U-843 X X

NOTE: Additional modules available for specific applications

Model Number

Ignitor Voltage

Hot Rod Ignitor

Wiring Harnesses

Replaces

50M56U-843 120 V Yes Yes 300+

Can be used on both 120 V or 80 V Ignitor Applications. Kit comes with a 120 V HotRod Universal Ignitor upgrade and harnesses adaptors.

Integrated Single Stage Universal Applications

• Universal controls available as a kit, or module only

Model Number

Ignitor Voltage

Hot Rod Ignitor

Wiring Harnesses

Replaces

50A55-843 120 V No No 110+

50A65-843 80 V No No 20+

Lower cost option that are based on ignitor voltage.No Hot Rod Universal Ignitor or wiring harnesses included.

Integrated Controls for Goodman Applications• If you service primarily Goodman products you can use the Universal

50M56U or direct drop in replacements. • Goodman made a running change in their furnace controls in the 2004

timeframe. The main difference between the controls is the wire harness connections

Model Number

Older Furnaces Newer Furnaces

NotesSingle Stage Single StageGMH/GCH/GME

Two Stage

50M56U-843 X X X B18099-13 Only

50T35-743 X B108099-06/08/10/13

50A55-743 XPCBBF109-112, 0130F, 50A55

and 50T55

50M56-743 X X0130F00006,

PCBBF109 /122/132

IFC Replacement Options - Goodman

Universal Direct Replacement Direct Replacement Direct Replacement

Model 50M56U-843 50T35-743 50A55-743 50M56-743

Ignition Source HSI (120 v) HSI (120 v) HSI (120 v) HSI (120 v)

Stages 1 1 2 1

Blower Motor 2 Speed PSC 2 Speed PSC 3 Speed PSC Multi-Speed PSC

Replaces 300+ 7+ 13+ 10+

Ignitor Included HotRod Universal 120v ignitor N/A N/A N/A

Harnesses Included Harnesses with Selection chart N/A N/A N/A

Diagnostics System Diagnostic LED with Fault Recall System Diagnostic LED System Diagnostic LED System Diagnostic LED with

Fault Recall

Humidification Voltage 120V 120V or 24V 120V N/A

Electronic Air Cleaner Voltage 120V 120V 120V 120V

Integrated Controls for Lennox Applications

• If you service primarily Lennox Furnaces the 50M56U can be a suitable replacement because it comes with a 120 V Hot Rod Ignitor upgrade. For 80 V Ignitor Direct Replacements there are two choices

Lennox Single Stage Furnaces

Model Number

Ignitor Voltage

Lennox Replacements Notes

50M56U-843 120 V +45 Kit includes 120 V HotRod Universal Ignitor and harness adapters

21D83M-843 80 V +40 Replaces Lennox 83M00 Kit with wiring harness and adapter plate

50A66-743 80V +16 Replaces Lennox 83M00 Board Only

IFC Replacement Options - Lennox

Universal Kit Direct Replacement Kit Direct Replacement

Model Number 50M56U-843 21D83M-843 50A66-743

Ignition Source HSI (120 v) HSI (80 v) HSI (80 v)

Stages 1 1 1

Blower Motor 2 Speed PSC 2 Speed PSC 3 Speed PSC

Replaces 200+ 20+ 16+

Ignitor Included HotRod Universal Nitride 120v ignitor N/A N/A

Harnesses Included Harnesses with Selection Chart

Harnesses with Selection Chart N/A

Diagnostics System Diagnostic LED with Fault Recall System Diagnostic LED System Diagnostic LED

Humidification Voltage 120V 120V or 24V 120V or 24V

Electronic Air Cleaner Voltage 120V 120V 120V