Furnace Repair Boise Id – Flame sensor
flame sensor
For this furnace repair Boise Id. we are going to talk about flame sensors. A flame sensor is a device that, yep you guessed it, senses flame. The flame sensor sits in front of the last burner and directly in the path of the flames. When your ignitor lights the gas, every burner is lit and then the sensor sends a signal back the the main control board telling it that it is OK to leave the gas on.
Diagnosis
On this furnace repair Boise Id. the control board was giving us a code error of failure to light. Most newer furnaces (last 20 years) have a diagnosis light on the control board to let you know the general failure. This one was a code 34 failure to light. Upon checking the furnace we found that all the burners lit just fine but the sensor was not sensing that they were lit. When this happens the burners run for 8 seconds then go out. It will repeat this 3 times and then go into a lock out mode. To fix this issue we needed to clean the flame sensor. On this furnace repair Boise Id the furnace was in the laundry room, and we discovered that fabric softeners coat the sensor with material making it hard to sense the flame. We cleaned the flame sensor with a light grit sand paper and put it back together. This furnace repair Boise Id is all fixed. This is not the only problem that can occur when you get a code 34.
Other causes
Failure to light can also be a bad ignitor, shorted flame sensor, bad gas valve, bad control board just to name a few. However this is the most common issue for that code. If you experience a failure to light code on a furnace repair Boise Id this may be your issue. For all your heating and cooling needs acRepairBoise.com is here to help you through them. Visit our other blog posts and web page. Be sure to like us on face book for money saving coupons and other tips about your system. Call us anytime for more information or to book a service call or cleaning. 208 898-9888
cleaned and installed flame sensor