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Is red LED status light on?

YES

NO

Is there 115v at L1 and L2?

NO

 

 

 

 

 

 

 

YES

 

 

 

 

NO

 

 

Is there 24v at SEC-1 and SEC-2?

 

 

 

 

 

 

 

YES

 

 

 

 

 

 

Replace control center.

 

 

 

 

 

 

 

 

 

 

Is door switch closed?

YES

Is there 115v going to switch?

YES

Replace door switch.

Replace transformer.

NO

NO

Close door switch and go to start.

Is circuit breaker closed?

 

NO

 

 

 

 

 

 

 

 

 

YES

 

 

 

 

 

 

 

 

 

 

Close circuit breaker and

 

 

go back to start.

 

 

 

 

 

 

 

 

 

 

13

Is red LED status light blinking rapidly without a pause?

NO

Is red LED status light blinking ON/OFF slowly with a combination of short and long flashes?

YES

Determine status code. The status code is a 2 digit number with the first digit determined by the number of short flashes and the second digit by the number of long flashes.

YES

NO

Check for correct line voltage polarity. If units are twinned, check for proper low-voltage (24v) transformer phasing.

Check for previous fault by momentarily shorting the TEST terminal and the C terminal until the LED goes out. LED will flash the status code of any previous fault or the code No. 11 (1 short and 1 long flash) if no previous fault. After the control repeats the code 3 times, the control will go through a brief component test sequence. The inducer will start and run for the entire component test. The HSI, blower motor heat speed, and blower motor cool speed will run for 10-15 sec each.

Was there a previous fault code other than No. 11?

YES

NO

Does control respond to W, Y, or G 24-vac thermostat signals?

YES

NO

Check for continuity in wire from circuit breaker to furnace.

Check room thermostat or interconnecting cable.

NO

Is 24 vac present at W, Y, or G terminals on the control?

YES

Go to section with status code determined.

Run system through a heating or cooling cycle to check operation. Status codes are erased after 48 hrs or whenever power (115v or 24v) is interrupted.

Replace control if it does not respond to 24-vac signal at W, Y, or G screw terminals.

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Carrier 58MXA instruction manual → Troubleshooting Guide
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58MXA specifications

The Carrier 58MXA is an advanced heating and cooling system that exemplifies Carrier's commitment to innovation, efficiency, and comfort. Designed with the modern homeowner in mind, this gas furnace boasts a range of features that make it stand out in today's market.

One of the primary characteristics of the 58MXA is its impressive efficiency ratings. With AFUE (Annual Fuel Utilization Efficiency) ratings reaching up to 80%, the furnace ensures that homeowners can enjoy warmth during the colder months without excessive energy consumption. This efficiency not only translates to lower utility bills but also contributes to a reduced carbon footprint, making it an eco-friendly choice for environmentally conscious consumers.

The 58MXA utilizes a two-stage heating system which allows for more precise temperature control. This feature enables the furnace to operate at a lower stage for most of the heating cycle, providing comfortable warmth while conserving energy. When temperatures plummet, the system seamlessly switches to a higher stage for added heating capacity, ensuring that homes remain cozy even in extreme cold.

Furthermore, the Carrier 58MXA is engineered with advanced airflow and quiet operation in mind. Its variable-speed blower motor allows for optimal airflow throughout the home, enhancing overall comfort by distributing heat evenly in each room. This system also operates at a significantly reduced sound level compared to standard furnaces, promoting a peaceful indoor environment.

The 58MXA comes equipped with an innovative smart thermostat option, allowing users to monitor and control their home's heating remotely. This capability provides convenience and the opportunity for additional energy savings, as homeowners can adjust settings on the go or set schedules to meet their specific needs.

Durability is another hallmark of the Carrier 58MXA. Constructed with high-quality materials and backed by a manufacturer’s warranty, this furnace is built to withstand the rigors of temperature fluctuations and heavy use. Regular maintenance is also simplified, allowing homeowners to ensure optimal performance over the years.

Overall, the Carrier 58MXA is a top-of-the-line heating solution that combines efficiency, comfort, and advanced technology. Its innovative features and robust design make it an excellent choice for homeowners seeking a reliable and effective heating system. Whether for new construction or upgrading an existing home, the 58MXA is poised to provide years of dependable service.
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