Carrier Comprehensive Guide to Furnace Troubleshooting, LED Codes, and Error Codes
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SERVICE

LED CODE

STATUS

RED LED1 ON

Furnace is operating in emergency heat.

RED LED2 ON

The microprocessor has malfunctioned. To reset: Put setup switch "SW-1" in the "ON"

 

position and jumper thermostat terminals "R", "W/W1", and "Y/Y2" simultaneously with

 

the door switch pushed in and power to the unit "ON". Disconnect jumper and place

YELLOW LED3 ON

setup switch in the "OFF" position. If LED2 reappears replace main control board.

Furnace is operating in high heat.

GREEN LED4 ON

Furnace is operating in low heat.

RED LED2 FLASHING

Line voltage polarity is reversed.

EACH OF THE FOLLOWING STATUS CODES IS A TWO DIGIT NUMBER WITH THE FIRST DIGIT DETERMINED BY NUMBER OF FLASHES OF THE YELLOW LED AND THE SECOND DIGIT DETERMINED BY NUMBER OF FLASHES OF THE GREEN LED.

11NO FAULT IN RECENT HISTORY DISPLAY - Indicates no faults have occurred within last five cycles. To read recent fault history put setup switch "SW-1" in the "ON" position. To clear recent fault history, put setup switch "SW-1" in the "ON" position and jumper thermostat terminals

"R", "W/W1", and "Y/Y2" simultaneously until an "11" is flashed.

12BLOWER CALIBRATION LOCKOUT - Indicates RPM calculated for low heat was less than 250 RPM or greater than 1300 RPM on two successive attempts. Auto reset after three hours. Reset

power and refer to fault #44 section.

13LIMIT SWITCH LOCKOUT - Indicates the occurrence of 10 successive limit trips during high heat or three successive limit trips during low heat. Auto reset after three hours.

Check for:

- Improper or misaligned limit and/or limit shield.

-Improper high or low heat gas input adjustment.

-Stuck high heat solenoid in gas valve.

14IGNITION LOCKOUT - Control will auto-reset after three hours. Refer to #34.

21INVALID MODEL SELECTION - Indicates model plug is missing or incorrect. See wiring diagram for correct connector jumper location.

22SETUP ERROR - Indicates setup switch "SW-1" or SW-6" is positioned improperly. The following combinations will cause the fault.

-Thermostat call with "SW-1" "ON".

-Thermostat call with "SW-6" "ON".

-"SW-1" and "SW-6" both "ON" together.

23INVALID BLOWER AIRFLOW SELECTION - Indicates improper "A/C" or "CF" switch setting. The 042 and 14 units can deliver 1-1/2 to 3-1/2 tons A/C and 600 to 1400 CFM for continuous fan. The

060 and 20 unit can deliver 2 to 5 tons A/C and 800 to 2000 CFM for continuous fan. If code is flashing unit will default to closest allowable airflow.

24SECONDARY VOLTAGE FUSE IS OPEN

Check for: - Short circuit in secondary voltage (24V) wiring.

31HIGH PRESSURE SWITCH FAULT - Indicates high pressure switch is closed at call, or in low heat,

or fails to close after call, or opens in high heat.

Check for:

- Plugged condensate drain.

-Water in vent piping, possibly sagging pipe.

-Improper pressure switch wiring or pressure switch tubing connections.

-Failed or "Out-of-Calibration" pressure switches.

32LOW PRESSURE SWITCH FAULT - Indicates low pressure switch is closed at call, or fails to close after call, or opens during operation.

Check for:

- Plugged condensate drain.

-Water in vent piping, possibly sagging pipe.

-Improper pressure switch wiring or pressure switch tubing connections.

-Failed or "Out-of-Calibration" pressure switches.

33LIMIT OR FLAME ROLL-OUT SWITCH IS OPEN - Indicates the limit, rollout switch or auxiliary limit switch is open or the unit is operating in high heat only mode due to two successive low heat

limit trips. Check for: - Improper or misaligned limit and/or limit shield.

-Improper low heat gas input adjustment.

-Stuck high heat solenoid in gas valve.

A99243a

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Contents Troubleshooting Guide Start Here Section ExampleÐCooling Mode ÐVariable Speed Furnace Control ÐWith DE Connection Lowed by the lowest number fault code. Example 13, 13 Service Status Code Example → ÐService Label/Fault Code InstructionsStep Action YES GO to ÐAir Conditioning A/C Airflow Setup Switch Position LEDs 1, 2, 3, or 4 on Solid Solid means on continuously Step Action YES GO to Fault Code Motor MTR2 →44 Page Lowed by the lowest number fault code. Example 14, 14 Fault Code ÐTwo-Speed AC/HP Airflow Requirements CFM ÐContinuous Fan CF Airflow Setup Switch PositionPage · LOW Heat Page →18 →40 Utes 14ÐIGNITION Lockout Ber indicated in Index for Fault Code →26 Turn power off Is inducer blower wheel okay? 55 ¬ Rpmrpm highlow ¬ →20 Index for Fault Code Cleanup and START-UP Instructions Appendix a Board Layout and SchematicControl Center Schematic Diagram Wiring SchematicIsolation Circuits Pressure Check DiagramAppendix B Appendix CAppendix D Quick Motor Test Procedure→33 →59 Example AIR Delivery Curve Ð Appendix EAir Delivery CurveÐ120-20 Air Delivery CurvesAir Delivery Curve Ð Air Delivery CurveÐ100-20Closet Ð Downflow Application Static Pressure Reading Location DiagramsBasement Ð Upflow Application Upflow Total Static Pressure Reading LocationsAttic Ð Horizontal Application Duct Static Check Sheet Quick Reference Information Appendix FThermostat Staging Algorithm Appendix GVariable Speed Condensing Furnace Algorithm Service Training
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58MVP specifications

The Carrier 58MVP is a high-efficiency gas furnace designed for optimal performance and energy savings. This model represents Carrier's commitment to innovative engineering and advanced technology, making it a preferred choice for homeowners seeking reliable heating solutions.

One of the standout features of the 58MVP is its impressive Annual Fuel Utilization Efficiency (AFUE) rating, which can reach up to 96 percent. This high AFUE rating indicates that the furnace uses less energy to produce heat, leading to lower utility bills and a reduced carbon footprint. The furnace is equipped with a two-stage gas valve that allows it to operate on a low setting during mild weather, providing increased efficiency and comfort.

The 58MVP also features Carrier's Infinity Control system, an advanced programmable thermostat that enables homeowners to customize their heating preferences. This system allows for precise temperature control and scheduling, ensuring that the home remains at a comfortable temperature while minimizing energy consumption.

In addition to its efficiency, the 58MVP is designed with noise reduction technology, including a quiet operating blower and insulated cabinet. This reduces operational sound, allowing for a more peaceful home environment. The model's multi-speed blower motor enhances comfort by providing consistent airflow and further optimizing efficiency.

Durability is a key characteristic of the Carrier 58MVP. It has a stainless-steel heat exchanger that promotes longevity and performance. The furnace is also equipped with a galvanized steel cabinet featuring a powder-coated finish, which protects against rust and corrosion.

The 58MVP is compatible with Carrier's advanced air purification systems, optimizing indoor air quality while heating. With features designed for efficiency, comfort, and durability, the Carrier 58MVP is an exceptional choice for homeowners looking to enhance their heating systems. The combination of advanced technologies, such as the two-stage operation and Infinity Control, positions this furnace as a leader in the market, meeting the needs of today's energy-conscious consumers. Ideal for both new constructions and retrofits, the Carrier 58MVP continues to set the standard for residential heating solutions.
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