What does blinking light on Carrier furnace mean?

While Codes 31, 33 & 13 are the most common, here are some additional blinking light meanings: Problem A: Low pressure switch fault. Problem B: Blower motor malfunctions. Problem C: Reversed line voltage polarity.

How do you read carrier error codes?

Carrier Furnace Error Codes Each status code is a two-digit number. The first number is determined by the number of short flashes and the second digit by the number of long flashes. Line voltage polarity is reversed. If twinned, refer to twinning kit instructions.

What is internal control fault?

Internal Control Fault. (LED 8 flashes) Microprocessor has sensed an error in the software or hardware. If error code is not cleared by resetting unit power, replace the IGC. Internal Software Fault.

What does the yellow blinking light on my furnace mean?

If you see 1 amber/yellow flash, this means that everything is okay and the thermostat is signaling the need for cooling. If 2 amber/yellow flashes appear, it signals that everything is okay and there is a call for heat.

Why is my carrier thermostat blinking?

If you see a flashing light on your thermostat, that’s a signal that there’s a problem with your outdoor unit. When this happens, your outdoor unit will shut off and send a signal to your thermostat, causing it to blink. Thing is, that signal doesn’t mean your indoor unit is made aware of the problem.

How do I reset my carrier control board?

How to Reset a Carrier Air Conditioner Unit

1. Locate the “Reset” button on the air conditioner’s control panel.
2. Press and hold the “Reset” button down for 3 seconds and then release.
3. Press and hold the “Reset” button down for another 3 seconds — this time a light should flash on the display.

What does a solid red light mean on a carrier furnace?

This means the outdoor unit has shut itself off because of a problem, and it sends a signal to the thermostat, letting you know that there is a problem. When this happens, the indoor unit tends to keep on running because the indoor unit doesn’t know there is a problem.

What causes a pressure switch to be stuck open?

The most likely reason that your pressure switch is stuck open is due to: Obstructed venting (chimney/flue pipe) Disconnected or clogged pressure switch hose. Malfunctioning pressure switch.