1. הקדמה
This instruction manual provides essential information for the installation, operation, and maintenance of the Trane White Rodgers Upgraded Furnace Control Circuit Board, model 50A55-486. This board is designed as a direct replacement for the older part # 50A55-486 and is compatible with Trane and American Standard furnaces. Please read this manual thoroughly before proceeding with installation or service.
2. זיכערקייַט אינפֿאָרמאַציע
WARNING: Electrical shock hazard. Disconnect all power to the furnace before installing or servicing this control board. Failure to do so can result in serious injury or death.
- Always ensure the main power supply to the furnace is turned off at the circuit breaker or fuse box before beginning any work.
- Only qualified technicians should perform installation and service.
- Verify all wiring connections are secure and correct before restoring power.
- דו זאלסט נישט בייפּאַס קיין זיכערקייַט דעוויסעס.
3. פּראָדוקט איבערview
The White Rodgers 50A55-486 is an upgraded furnace control circuit board designed to manage the various functions of your furnace, including ignition, blower operation, and safety protocols. It serves as a direct replacement for the original 50A55-486 part.

Figure 1: White Rodgers 50A55-486 Furnace Control Circuit Board. This image displays the top view of the circuit board, showing various terminals, relays, and components. The board is white with green circuit traces and features multiple connection points for furnace wiring.
4. ייַנמאָנטירונג און סעטאַפּ
- מאַכט דיסקאַנעקשאַן: Before starting, ensure all electrical power to the furnace is completely disconnected at the main service panel.
- צוטריט צום קאנטראל ברעט: געפינען און עפֿענען די אויוון צוטריט פּאַנעל צו אַנטדעקן די עקזיסטירנדיקע קאָנטראָל ברעט.
- דאָקומענטירן עקזיסטירנדיקע וויירינג: It is highly recommended to take clear photographs of all wiring connections to the old control board before disconnecting them. Labeling wires can also prevent errors during reinstallation.
- אַראָפּנעמען אַלטע ברעט: Carefully disconnect all wires and mounting screws from the old control board. Note that the new board may have slightly different component layouts or terminal positions compared to the original.
- אינסטאַלירן אַ נייע ברעט: Mount the new White Rodgers 50A55-486 control board in the same location as the old one. Secure it with appropriate fasteners.
- פאַרבינדן וויירינג: Refer to your documented wiring (photos/labels) and the wiring diagram provided with your furnace or the new control board. Connect all wires to their corresponding terminals on the new board. Pay close attention to the "TWIN Y W R G C" terminals and "LINE NEUTRAL" connections.
- באַשטעטיקן קאַנעקשאַנז: Double-check all connections for tightness and correctness. Ensure no wires are loose or incorrectly placed.
- ומקערן מאַכט: Close the furnace access panel. Restore electrical power to the furnace at the main service panel.
- טעסט אָפּעראַציע: Initiate a heating cycle to verify proper furnace operation.
Note: Some users have reported that while this board is a direct replacement, the physical layout of terminals might differ slightly from older versions. Always cross-reference with your furnace's wiring diagram.
5. אָפּעראַציע
The furnace control board manages the sequence of operations for your heating system. A typical heating cycle involves:
- טערמאָסטאַט רוף פֿאַר היץ: When the thermostat calls for heat, the control board initiates the heating sequence.
- אינדוצירער מאָטאָר אַקטיוואַציע: The inducer motor starts to vent combustion gases.
- דרוק סוויטש קלאָוזשער: אזוי שנעל ווי גענוג לופט איז איינגעשטעלט, שליסט זיך דער דרוק-שוויטש, וואס סיגנאלירט דעם קאנטראל-טאוול צו גיין ווייטער.
- Ignition Sequence: The igniter is energized, followed by the opening of the gas valve.
- פלאַם סענסינג: The control board verifies the presence of a flame.
- בלאָווער מאָטאָר אַקטיוואַציע: After a short delay, the main blower motor starts to distribute heated air.
- הייצונג ציקל קאמפלישאַן: When the thermostat's set temperature is reached, the gas valve closes, the igniter de-energizes, and after a cool-down period, the blower motor shuts off.
ווידעא 1: איבערview of a Furnace Control Circuit Board. This video provides a visual demonstration and explanation of a furnace control board, highlighting its components and general function within a heating system. While the specific model shown may vary, the operational principles are similar.
6. וישאַלט
Regular maintenance helps ensure the longevity and efficient operation of your furnace and its control board.
- יערלעך דורכקוק: Have a qualified HVAC technician inspect your furnace annually.
- ריינקייַט: Keep the area around the furnace clean and free of dust and debris. Dust accumulation on the control board can lead to overheating or malfunctions.
- וויירינג אָרנטלעכקייַט: Periodically check for any loose or corroded wiring connections.
- לופט פילטער פאַרבייַט: Regularly replace or clean your furnace's air filter to ensure proper airflow and prevent strain on the system.
7. טראָובלעשאָאָטינג
The control board often includes an LED indicator to assist with troubleshooting. Refer to the specific diagnostic codes for your furnace model, which are typically found on the furnace door or in your furnace's manual.
געוויינטלעכע פראבלעמען און מעגלעכע לייזונגען:
- קיין היץ:
- קאָנטראָלירט די טערמאָסטאַט סעטטינגס.
- Verify power supply to the furnace.
- Inspect the furnace filter for blockage.
- קוקט נאָך דורכגעבראָכענע קרייז ברעיקערס אָדער דורכגעבלאָזענע פיוזן.
- Observe the LED indicator for diagnostic codes.
- Blower Not Operating:
- Ensure the thermostat is set to "AUTO" or "ON" as desired.
- Check for obstructions in the blower compartment.
- Listen for any unusual noises from the blower motor.
- ינטערמיטאַנט אָפּעראַציע:
- Could indicate a loose connection or a failing component.
- טשעק פֿאַר געהעריק גראַונדינג.
אויב איר קענט נישט לייזן א פראבלעם, קאנטאקטירט א קוואַליפֿיצירטן HVAC טעכניקער פאר הילף.
8. ספּעסאַפאַקיישאַנז
| שטריך | דעטאַל |
|---|---|
| סאָרט | טריין |
| מאָדעל נאָמען | 50A55-486 |
| טייל נומער | OEM Upgrd Replm. for Part # 50A55-486 |
| פּונקט וואָג | 12.6 אונסעס |
| פּראָדוקט דימענשאַנז | 4 X 4 X 6 אינטשעס |
| ייַנמאָנטירונג טיפּ | Screw-in or Snap-in |
| מאַטעריאַל טיפּ | קופּער |
| קאָנטראָל קאַנסאָול | קנופּ (Note: This specification seems generic and may not directly apply to the circuit board itself, but rather the furnace it controls.) |
| קאָליר | ווייַס |
| ערשטער דאַטע בנימצא | 4 יוני 2010 |
9. וואָראַנטי און שטיצן
For warranty information and technical support, please refer to the documentation provided with your specific product packaging or contact the manufacturer directly. As this is a replacement part, warranty terms may vary.





