RectifyHome is compensated for referring traffic and business to these companies. Such devices have a lot of cool features. Carrier Furnace Yellow Light Stays On | Carrier Comfort You need to know how to read them to correctly troubleshoot the ongoing problem. What does a yellow, red and orange blinking light mean on a carrier furnace? No faults have occurred in the last 5 previous cycles, and setup switch SW-1 is in on position. As long as you can count the number of light flashes, you can easily find out the underlying issue. This shows that the limit switch and will auto-reset after three hours. When your furnace begins to blink, it means theres a problem. Furnaces can last for many years, but eventually, they wear out and need to be replaced. This fault indicates an improper a/c or cf switch setting. If the furnaces condenser coils are dirty or there is a problem with the high-pressure switch, there may be an issue with the air pressure which might cause the orange color in the furnace. : Means line voltage polarity is reversed. Blower motor speed is less than 250 rpm or greater than 1300 rpm for more than 10 sec. This is another issue that requires the assistance of a professional. In most cases, the flashing will start, but the furnace will turn off just before it does. This combination of error codes and flashes will show you the source of the blinking. hey guys and gals looking for some help i have a carrier forced air gas furnace model number- 58MVC080-14 i recently had both primary and second heat exchangers replaced buy a carrier dealer free parts $600 in labor and i have had issues since im getting a solid amber light (no codes) on the fault indicator and have used the thermo to call for heat- got nothing, then i tried "jumping" the red . So, if you ever want to remove the message from the screen, follow these simple steps. If everything else is working well, the pressure switch may be broken. (Answered). No appointments. The number of flashing yellow lights doesnt always matter. If the yellow light has been on for a while, it's best to call a professional to take a look at your furnace.3) There could be an issue with the gas supply. When I power Check that the fan switch is turned to the on or auto setting. Furnace Repair - Error Code 31 - Pressure Switch Furnace Issues : The furnace has a closed pressure switch circuit that transfers electric current when it shouldnt. Turn the power off, remove the blower access panel, and disconnect the R thermostat lead. A furnace can get stuck in high fire mode due to a defective gas valve solenoid. This fault can indicate 1 of the following: Problems: Blower outside valid speed range. You are more likely to observe a solid orange light, which experts blame on a locked compressor. If it doesnt work I want you to consult a technician. It can either be successive limit trips due to high heat or successive trips due to low heat. The following are the most common codes decoded. A furnace is a device that uses combustion to generate heat. These problems can be caused by defective blower motor, dirty filter, loose blower wheel faulty switch or inadequate combustion air supply After fixing the issue, reset the furnace and test to see if it works. Then activate the heating system once more. Turn off the power supply to maintain safety. 1). If the temperature is too high or the pressure too low,the limit switch will close, instructing the furnace to shut down and enter lockout mode. furnace control CPU determines the combined low-heat and medium-heat on-time (from 0 to 16 minutes) which is permitted . It means that it stopped trying to sense the flame after a lockout timer expired. If you see 3 flashes of yellow, this indicates that there is no cause for concern and that your furnace is simply finishing a cycle that it started recently. Other factors to consider would be how well the furnace has been maintained, how many hours it spends heating your home in an average season and how warm you set your thermostat.