TH198024 – THERMOCOUPLE (24″)
Not sure this is the right one? Bring the old part or a photo of the data plate to the counter and we will match it with you - no account, no appointment, no minimums.
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.
A thermocouple is the safety device that keeps the pilot light gas flowing on older standing-pilot furnaces and water heaters. If your pilot light won’t stay lit after you release the button, the thermocouple is almost always the problem. The 24-inch is the most common length for residential gas appliances.
Specs: 24-inch length, stainless steel, universal adapter fittings included
Replaces: TH198024, 1980-024
Fits: Universal — fits most gas furnaces, water heaters, and boilers with standing pilot lights including Honeywell, White Rodgers, and Robertshaw gas valves
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 Sensor
- Detail24"
- Size24"
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.
Cross-reference numbers
This part replaces the following OEM and aftermarket numbers:
- 1980-024
- TH198024
Not sure if your number matches? Call (214) 340-9421 or bring the old part in — bench-testing is free.
Do I need an account to buy from you?
No. No account, no appointment, no minimums, and no contractor licence required. We have been open to the public in Dallas since 1998.
Do you ship?
No. Everything is sold in person at the counter - 10226 Plano Rd, Suite 104, Dallas TX 75238.
Can you help me work out what I need?
That is what the counter is for. Bring the old part, or a photo of the data plate, and we will work through it with you.
Do you test parts?
We meter capacitors, contactors, motors, ignitors, relays and transformers free at the counter, whether or not you buy from us.
What are your hours?
Monday to Friday 10am to 7pm, Saturday 10am to 3pm.
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