How to Troubleshoot a Payne Furnace's Blinking Lights

Like many new, high efficiency furnaces, Payne furnaces come equipped with an internal diagnostic system that lets you know if the system is not running properly. When the diagnostic system encounters a problem, it will alert you by flashing a code through the use of the light emitting diode, or LED, lights located on the furnace. By paying close attention to the LED display on your Payne furnace, you can troubleshoot any potential problems as they evolve. The LED lights are typically located on the front toward the bottom of the furnace where the controls are located.

Step 1

Watch the LED display and count the number of times the light blinks. Payne diagnostic codes are two number codes. The first number is indicated by fast blinks and the second number by slower blinks. Write down the code after counting out the blinks for both the first and second number.

Step 2

Refer to your owner's manual for the corresponding meaning of the codes. Some of the most common codes include a 13 or 33 which indicate a limit switch lockout, 14 or 34 indicate an ignition lockout, 24 indicates an open fuse and 31 indicates that a pressure switch is open. Any other fault code usually indicates the need to contact a service repair person.

Step 3

Check for a dirty air filter, a blocked return air or air-supply grille if you have a code 13 or 33.

Step 4

Check that the manual shut off valve located on the gas supply pipe is in the open position for a code 14 or 34. Turn off the electrical supply and remove the access doors if that is not the problem. Locate the control switch or knob on the gas valve inside the furnace and ensure that it is in the "on" position. If either of these were not on or open, you will need to follow your furnace's start-up procedures after opening or turning them on.

Step 5

Examine the fuses and the 24-volt wiring for a blown fuse or faulty wiring if your furnace gives you a code 24.

Step 6

Look for cracks or damage to any of the PVC pipes leading to the combustion-air intake and the vent or exhaust if you or given a code 31. Also look for blockages in the combustion-air intake both on the side of the furnace and outside the home. Examine the vent or exhaust on the outside of the home for obstructions.