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Is gas supply ON? If the igniter is faulty, it wont be able to light the gas, so the furnace wont stay on. Check the thermostat settings. Here is the full list of error codes usually found on Carrier furnaces. This fault could also indicate the gas valve relay on the furnace control board is stuck closed, or there is a miswire/short to gas valve wiring. How to fix: We recommend consulting your manual for the specific steps involved in resetting the flame rollout switch for your model furnace. Blinking can indicate a voltage issue. Instead, you need to call an HVAC expert. Carrier Furnace LED Codes - where do I find their meaning? It could be stuck open or not getting enough negative pressure. Defective inducer motor or start capacitor 4. Finally, if youve tried all of these solutions and the yellow light is still staying on, you might need to replace the furnace. It helps to swing in swiftly to troubleshoot and ideally fix the issue before it creates a bigger risk. If the burners still do not light, the switch will repeat the process. If a system problem occurs, a flashing LED shows a fault code. Lets examine the problem from a step-by-step perspective now. Whistling or rattlingcheck for loose connections in the ductwork that can rattle as air flows through. But they may take longer than you intended, especially the three flashes. : Indicate a problem with the flame itself. All Rights Reserved. If the yellow LED flashes five times, what does the digit say? If it is, the primary heat exchanger likely has a problem. Dont perform any of these repairs if you have a warranty. An open pressure switch may point to a bad furnace inducer motor, a bad pressure switch hose, an electrical circuit issue, or a defective switch. This might be because of incorrect wiring or a defective igniter. Clean dirty condenser coils with a soft cloth. Be sure to get the code the furnace is giving you before you cut the power. More importantly, this isnt a DIY job. How to fix: The immediate solution for this is to just turn your furnace completely off. If there is ever a malfunction in the system, your Carrier furnace is going to alert you about it.
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carrier furnace yellow light codes