Furnace Flame Sensor

Furnace Flame Sensors

We have seen many furnace flame sensor problems in our 25 year old HVAC business. The furnace flame sensor problem can be an easy fix which could save you lots of money and keep you from spending a cold night in your home. If you have a question please email us anytime. Our email address is: support@arnoldservice.com. We would love to Help You Out and Have Your Business!  Below we have page links to various brand name furnace flame sensors. Please click on the link to see the brand name flame sensors we have for sale. We also have a furnace flame sensor troubleshooting section below.

Amana Furnace Flame Sensors

American Standard Trane Furnace Flame Sensors

Bryant Carrier Furnace Flame Sensors

Goodman Janitrol Furnace Flame Sensors

International Comfort Products, Whirlpool Furnace flame sensors 

Nordyne Furnace Flame Sensors 

Rheem Ruud Furnace Flame Sensors

York Furnace Flame Sensors 

Furnace Flame Sensor Troubleshooting Section:

We have received hundreds of customer testimonials telling us how our customers have repaired their furnaces by cleaning or replacing the flame sensor. Below we tell what a furnace flame sensor problem looks like with the solution on how to fix the problem. Please keeep in mind that most of the time it is the flame sensor that is causing the problem, but sometimes it can be a control board problem or another furnace control problem. Most of the time it is the flame sensor.

Problem: Your furnace main burner ignites, the main burner stays on for 8 to 10 seconds, then shuts right back off. Your furnace tries this ignition sequence again, and the same thing happens. After 3 times the furnace goes into lock out, and the only way to get it out of lock out is to turn the power switch off and on. Everything starts over again without ignition of your gas burners. The furnace burners will not stay on, for only 8 to 10 seconds!
Solution: First, turn off the power to your furnace. Check all wires and ground wires to make sure they have good tight connections and are not burnt. Next, remove the screw or screws that hold your flame sensor in place. Please do not confuse the flame sensor with an Ignitor. We do not want to touch the ignitor at all. If you touch an ignitor it can shorten the life of the ignitor or it could break. Clean your flame sensor with steel wool or emery cloth (fine sand paper).  If you have a meter that will measure micro amps then you can test the flame sensor with a multi-meter. Below we have a YouTube video made by Grayfurnaceman which shows how to test a flame sensor using a multi-meter. Thanks to Grayfurnaceman for making this informative video! You might need a new flame sensor, but most of the time a flame sensor can be cleaned and your furnace will work after cleaning. I have seen furnace flame sensors go out sometimes. Most of the time when they go out the white porcelain is cracked. You might want to have a spare flame sensor on hand. Above we have links to the various name brand furnace flame sensor pages where you can purchase a new flame sensor. We only sell brand new OEM flame sensors. If you have any questions please email us anytime. Our email address is: support@arnoldservice.com. We would love to help you out and have your business!

If you have a meter that will measure micro amps then you can test the flame sensor with a multi-meter. Below we have a YouTube video made by Grayfurnaceman which shows how to test a flame sensor using a multi-meter. Thanks to Grayfurnaceman for making this informative video!

8 thoughts on “Furnace Flame Sensors

  1. I’m looking for radiant flame sensor for Trane TUJ060A936A0 model. Do you have it, or do you know where I can get one?
    Thanks

    1. I am sorry we do not stock any Trane radiant flame sensors, but our Trane parts program shows that your furnace uses radiant flame sensor part number SEN00388 which has been updated to KIT09660. So it looks like they want you to change out the control board and everything. Sorry for the bad news! Steve

  2. The flame sensor led light is not on at all in my furnace and the furnace will not blow any heat. What does this mean

    1. Hi Kellie! If your furnace control board is flashing a flame sensing error code. Then I would suggest cleaning your flame sensor with steal wool or light sand paper. We discuss this on the following page: https://arnoldservice.com/problem-your-furnace-main-burner-ignites-the-main-burner-stays-on-for-8-to-10-seconds-then-shuts-right-back-off/ I hope you can easily find and fix the problem. Steve

  3. We had the flame sensor changed and the house seems colder even after the heater cycles off. Do flame sensors come in different degrees to where the the heat comes on and then turns the blower on? Seems like even when it’s set on 78ºit doesn’t feel like it.

    1. Hi Dale! The flame sensor does not have anything to do with the amount of heat that comes out of your furnace. The flame sensor is a safety device which senses the flame of the burners when the furnace initially lights. If the furnace flame does not light then the flame sensor shuts the gas off and prevents the furnace from blowing up from a gas explosion. This sounds like you might have a thermostat problem or might need an adjustment on the control board to make the blower shut off sooner so it does not blow cold air. Thanks for asking this question. Steve

  4. My furnice is blowing cold air the flame comes on but wont stay on any suggestions??

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