What Do 4 Blinks Mean On A Goodman Furnace?

The four red flashes mean a high limit switch or 24-volt fuse is open. A malfunctioning blower motor, a clogged air filter, a defective ducting system, an open fuse on the control board, or limited circulating air circulation are just a few of the potential causes. Meanwhile, one light blinking slowly and the other flashing rapidly could indicate a low flame signal in your heating system. Even if your furnace appears to be heating properly, this can occur. A mucky flame sensing rod, or one mounted in the wrong place on the burner, would cause this problem.

The limit switch remains closed except in cases where there is a demand for heat. The main control likely de-energizes the gas valve and starts the enclosed blower (on heat speed) as well as the draught motor if the limit switch is open and there is a need for heat. Until the limit switch closes, your Goodman furnace will flash four times. When the limit switch closes and the need for heat is lost, an indoor blower and induced draft motor runs through selected fan delay and post purge. The control will retain its normal functioning state after the blower-off delay is finished. If your furnace is facing these kinds of issues, call heating service tomball tx for all your HVAC maintenance needs.

What Do Yellow Light And Red Light Flashing on Your Furnace Suggests?

In case you’re scratching your head thinking why does your Goodman furnace keep flashing Yellow. The answer is simple, it’s a sign that the furnace is hooked on the high-fire setting. The High-fire setting only functions for a brief amount of time to warm a very cold room faster.

The red light on your Goodman furnace is a code, it means that the circuit board is functioning normally and is awaiting a heat signal. You’ve got the fan going, but you’re not receiving any calls for heat. Both of these issues point to a malfunctioning thermostat.

Why is My Goodman Furnace Not Lighting?

The furnace may not be getting enough gas to ignite even when the glow ignitor is turned on. To fix this issue, locate the gas supply valve behind or next to the furnace and turn it counterclockwise to the “Open” position.

In case your furnace keeps powering down, it could be due to reduced airflow. It’s not just a direct problem that’s to blame for poor airflow. Clogged and dirty will cause your heat exchanger to trap heat, eventually causing it to overheat.


There is no substitute for an expert’s opinion. Comfort Makers LLC is the best HVAC heating service provider in Tomball tx. Call us at (281) 861-0160 in your times of technical crisis and our expert and certified technicians will be there to lend a hand with all of your air – conditioning and heating needs.

In addition to tune-ups and safety checks, our HVAC technicians also clean, repair, and replace HVAC components as needed, so you don’t need to stress about running out of clean, warm air during the cold months. Ring us today to schedule a consultation or to avail of our HVAC services.


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