











🔥 Stay warm, stay worry-free — the smart thermocouple upgrade you can’t afford to miss!
The Honeywell Home CQ100A1039 Replacement Thermocouple is a 30-inch, copper-built safety sensor designed for gas furnaces, boilers, and water heaters. Featuring analog output and surface mount design, it offers reliable flame detection up to 2500°F, ensuring efficient and safe operation. Easy to install and highly durable, it’s a cost-effective essential for maintaining your heating system’s performance.



| ASIN | B000E3F3O6 |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #41,305 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #51 in Water Heater Replacement Parts |
| Brand | Honeywell Home |
| Color | Copper |
| Customer Reviews | 4.5 4.5 out of 5 stars (348) |
| Date First Available | July 25, 2007 |
| Global Trade Identification Number | 00085267870306 |
| Included Components | water heaters |
| Is Discontinued By Manufacturer | No |
| Item Package Quantity | 1 |
| Item Weight | 1.6 ounces |
| Item dimensions L x W x H | 0.25 x 0.25 x 33 inches |
| Item model number | CQ100A1039 |
| Manufacturer | Resideo |
| Material | Metal |
| Maximum Supply Voltage | 0.03 Volts |
| Measurement System | Imperial |
| Measuring Range | -40°F to 2500°F (-40°C to 1371°C) |
| Mounting Type | Surface Mount |
| Output Type | Analog |
| Part Number | CQ100A-1039 |
| Product Dimensions | 0.25 x 0.25 x 33 inches |
| Sensing Distance | 30 Inches |
| Shape | Shape |
| Size | 30-Inch |
| Style | Classic |
| UPC | 085267870306 |
| Upper Temperature Rating | 2500 Degrees Fahrenheit |
| Voltage | 30 |
| Warranty Description | As labelled |
E**E
KEEP SPARES ON HAND
We keep several of these on hand for when they burn out. Easy to install. Gets the boiler up and running in minutes. They are cheap enough that we can have a bunch hanging from the basement rafters, ready to go. They last about 2 heating seasons. Takes about 10 minutes to change. Saves a ton of money by not having to call a boiler repairman!
M**2
Great buy
We have bought this a few times for our pellet grill. Fits great, not a bad price and easy to install.
J**Z
good product for a good price
This thermo - couple is great and does the job perfectly on my weil mclain boiler.
B**S
It worked.
Easy install, worked well.
J**F
It does as it is supposed to do.
I used this on a hot water boiler. The boiler is more than 43 years old. The thermocouple was replaced about every 7 years. I consider this quite normal for being in flame continuously.
T**Y
Great replacement
Great for my furnace. I keep A spare in “the drawer”. It’s saved us on the coldest of nights.
A**O
Works fine
Not an exact fit for my installation. But that it not its fault. I had to kinda modify it a bit. But it is installed and working.
A**R
Good quality
Nice quality thermo couple
A**R
Good quality
L**W
they work
J**R
This was hard to find anywhere else - fast delivery - product works
C**E
I received a Resideo branded Thermocouple not a Honeywell branded Thermocouple. I compared the Resideo package and an older Honeywell package and the information is identical (including the company address in the US and support phone number). Apparently Resideo sells a range of products under the Honeywell Home brand through a long-term licensing agreement. The product looks good and is still assembled in Mexico (just like the Honeywell). Hope this clears up any confusion with the names.
S**N
Can always depend on Honeywell products!
Trustpilot
1 week ago
2 weeks ago