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Fixing Your Goodman Furnace: What to Do When You Get Error Code 4 Blinks
It’s the dead of winter, and you just got home from work to find your home uncharacteristically chilly. You head up to check on the thermostat, and you immediately see why your house is so frigid: The red light on your furnace has come on with four blinks, signifying a problem. What does error code 4 blinks mean? How can you fix it? These things never seem to fail at the worst possible time, but if you catch the problem early enough you have some troubleshooting options available. If left ignored too long, however, your furnace could become permanently damaged or even pose a fire risk. Here’s what you need to know about fixing your Goodman furnace when it gives you error code 4 blinks…
What Do Error Code 4 Blinks Mean?
The most common error codes that appear on your thermostat’s display are the numbers 1 and 4 blinks together, with a few other variations in the sequence. Each of these codes has a very specific meaning, so the first thing you will want to do when you see this error is to consult the Goodman manual. The manual should list the error codes, their meanings, and some troubleshooting steps you can take to rectify the problem. If you don’t have access to the manual, you can find a list of common furnace error codes here. Error code 4 blinks, the most common error code you will see on Goodman furnaces, means the thermostat has received a signal from the furnace indicating a problem.
How to Fix Your Goodman Furnace When You Get Error Code 4 Blinks
The first thing you should do when you get error code 4 blinks is to check the furnace pressure switch. This device, which is normally closed, allows the gas to flow into the furnace when the thermostat sends a signal to start heating. If the pressure switch is the issue, you will see the same error code if you manually open the device. There are a few reasons why the pressure switch could fail. The most common issue is that the switch is not properly seated in the furnace. This can occur if the furnace has been moved and the switch is not put back into the proper position. If you suspect this is the problem, you will have to manually open the switch to see if it is working properly. If the pressure switch is broken, you will need to replace it.
Checking for a Basic Problem
Sometimes an easy mistake can cause the same error code as a more serious problem. For example, your thermostat might simply be set too low to start the furnace. Check the thermostat’s settings, and make sure the temperature is high enough to turn the furnace on. The thermostat could also be set to “hold,” causing the furnace to stay on even after the temperature has reached your desired level. If this is the case, reset the thermostat and make sure it is set to “on” instead of “hold.”
Resetting the Thermostat and Thermostat Controls
If you have checked the pressure switch, thermostat settings, and thermostat controls and still get error code 4 blinks, the thermostat may just need a reset. Most thermostats have an “emergency” or “hold” button you can press to reset the device. Hold this button down for about 10 seconds, then let go and see if the furnace starts up again. If this doesn’t work, you will have to replace the thermostat.
Checking for a More Serious Issue
Furnace error code 4 blinks can sometimes mean a wiring or control issue inside the furnace itself. If you have checked the pressure switch, thermostat, and controls and still see error code 4 blinks, the next step is to call a professional. A professional will have the tools and experience to diagnose the problem and tell you if it can be fixed or if you must replace the furnace.
If you see error code 4 blinks on your thermostat, the first thing you should do is take a moment to calm down. This is not a sign of an emergency, just a minor inconvenience that can be fixed. Start by checking the pressure switch, thermostat settings, and thermostat controls. If none of these are the issue, you will have to call a professional to diagnose the problem. In most cases, the issue is something small that you can easily correct.