Bosch furnace error yellow light

Sometimes, when a furnace malfunctions, there’s a chance that it will generate a yellow light. Yellow light can mean different sources of errors like the gas valve or the heat exchanger. There are many causes for this error, but it’s not typically dangerous when it just emits yellow light.

The Bosch gas furnace error yellow light is a sign of a problem that needs to be fixed. When the furnace cannot fire up, the plenum will fill up with gas, and the red warning light will turn on. This is due to a faulty sensor, wiring issue, or incorrect operation of the blower in your unit.

If you have noticed your Bosch gas furnace error yellow light flashing or blinking on and off, then there are different things you can do before calling in a technician. You can check for bad or loose connections at terminals, overload protection or tripping breakers and ensure all power sources are turned off before troubleshooting for any other issues.

Bosch has some good resources that can help troubleshoot your furnace but don’t always call them before checking the error codes yourself.

We know that when our furnace runs on the ECON setting, it can be hard to keep up with the cost of heating. If you’re seeing a yellow light on your Bosch furnace display, you should be able to figure out the problem without needing help.