S1-02530801000 – FLAME SENSOR (YORK)
9 times out of 10 a 'no heat' call is a dirty flame sensor, not a bad one. Pull it, rub the metal rod with fine emery cloth or a green Scotch-Brite pad until it's bright silver, reinstall. Save yourself $20.
10226 Plano Rd, Suite 104, Dallas TX 75238
Questions? Call or text (214) 340-9421
Mon–Fri 10 am – 7 pm | Sat 10 am – 3 pm
Symptoms of failure
- Burners light for a few seconds then shut off
- Furnace repeats the same short cycle over and over
- Board flashes a flame-sense or flame-failure code
- It happens more on cold mornings than warm afternoons
- Sensor rod is coated white, orange or sooty
- Furnace runs fine after someone cleans it, then quits again a month later
Seeing these does not always mean this part is the culprit. Bring the old one in and we will meter it at the counter, free, before you buy.
If your furnace lights but shuts off after a few seconds, a dirty or failed flame sensor is the most likely cause. The S1-02530801000 is the factory OEM flame sensor for York furnaces and also fits Coleman and Luxaire models made by the same manufacturer.
Replaces: S1-02530801000
Fits: York, Coleman, and Luxaire gas furnaces
Need help? See our Furnace Not Heating Guide.
In stock at Open To Public HVAC Parts in Dallas. We test parts at the counter before you buy. Call or text (214) 340-9421.
Specs
- TypeFlame rectification sensor
- MaterialKanthal alloy rod
- MountSingle-screw bracket (verify with old part)
- Typical Reading2-6 µA DC (microamps) when sensing flame
- VersionYork OEM
Installing it yourself
- Power off at the furnace switch and confirm 0V.
- Note the bracket position and the single wire connection.
- Remove the one screw and slide the sensor out of the flame path.
- Try cleaning it first with fine steel wool or an emery cloth - never sandpaper grit that leaves residue.
- If cleaning fixes it and it comes back within weeks, the rod is worn out or the ground is poor.
- Fit the new sensor so the rod sits in the same part of the flame.
- A dirty flame sensor is the single most common cause of a furnace short-cycling - check this before you replace a board.
Power off at the disconnect first, every time. Not sure partway through? Bring it to the counter and we will walk it with you.
Fits these models
- York LX, P3, P4 gas furnace series
- Coleman, Luxaire (York-built) gas furnaces of equivalent era
- Most York 80%+ AFUE gas furnaces from late 1990s onward
- Verify bracket geometry matches your existing sensor
How do I clean a flame sensor?
Pull the sensor (usually one screw), rub the metal rod with fine emery cloth or a green Scotch-Brite pad until it's bright silver. Don't use sandpaper coarser than 600 grit. Reinstall, fire the furnace, see if it stays lit.
How do I test a flame sensor?
Put a DC microamp meter inline between the sensor and the control board. With flame present, you should read 2-6 µA. Below 1 µA = dirty or dead — clean first, then replace if cleaning doesn't help. Bring it to the counter, we test free.
How long should a flame sensor last?
5-10 heating seasons typical when kept clean. Hard-water condensate, high-mineral combustion air, or short-cycling all shorten it. Most flame sensor "failures" are just dirty buildup — clean before replacing.
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