Williams Terminal Block Thermocouple-P322391 - The Home Depot
Message to Our Customers


Model # P322391

Internet # 202034889

Terminal Block Thermocouple

Williams Terminal Block Thermocouple

This item has been discontinued.
The Home Depot no longer carries this specific product.

$20.88 / each
  • Perfect for use with your wall furnace
  • Delivers high output for reliable performance


Model # P322391

Internet # 202034889

Store SO SKU # 860980

The Williams Terminal Block Thermocouple is designed to provide high output for impressive performance, making it great for use with your wall furnace. For your convenience, the terminal block thermocouple includes a vent limit switch and a built-in junction box, and it can fit many types of Williams furnaces.

  • Equipped with a built-in junction box to which wires from the vent limit switch are connected
  • Includes a vent limit switch for your convenience
  • 24 in. length
  • Fits Williams model numbers 3508731, 3508732, 4007731, 4007732, 5008731, 5008732, 6257731, 6257732, 6508731 and 6508732

Info & Guides

You will need Adobe® Acrobat® Reader to view PDF documents. Download a free copy from the Adobe Web site.


Assembled Depth (in.) 
1 in 
Assembled Height (in.) 
24 in 
Assembled Width (in.) 
1 in 
Product Depth (in.) 
Product Height (in.) 
Product Width (in.) 
1 in 
Brand/Model Compatibility 
Select Williams Furnaces 
HVAC application 
Product Weight (lb.) 
1 lb 
Warranty / Certifications
Manufacturer Warranty 
Refer to Williams’ “Limited Warranty” for details. 


Rated 4.5 out of 5 by 11 reviewers.
Rated 5.0 out of 5.0 by Terminal Block Thermocouple Terminal Block Thermocouple fixed my problem and we were happy. April 8, 2015
Rated 5.0 out of 5.0 by pleased very happy with product, price and service!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! December 17, 2014
Rated 4.0 out of 5.0 by These prod work good This prod was hard to find, once I found it the best overall price was at Home Depot I just wish I had one close so I didn't have to pay for shipping March 18, 2014
Rated 5.0 out of 5.0 by Terminal Block Thermocouple I'm so glad we were routed to Home Depot site, and able to order this part, easy to install, works just great, my mother once again has a workng wall furnace. February 7, 2010
Rated 4.0 out of 5.0 by quick delivery of a hard-to-find part the average hardware store does not carry this part for a Williams heater. April 29, 2014
Rated 5.0 out of 5.0 by easy install Great Product easy to install Homedepot Saved Me alot of Money June 26, 2012
Rated 1.0 out of 5.0 by Safety feature costs twice as most. I'm not happy with the design of this part at all. It costs more than double your typical thermalcouple & has to be ordered. I had to replace it twice in less than a year. So the quality can't be very good either. I will never buy another Williams brand heater. February 11, 2014
Rated 5.0 out of 5.0 by Worked perfectly Worked perfectly even though my old Williams unit was not one of the model numbers listed February 11, 2014
  • 2015-05-23T11:01:22.551-05:00
  • bvseo_lps, prod_bvrr, vn_prr_5.6
  • cp-1, bvpage1
  • co_hasreviews, tv_11, tr_11
  • loc_en_US, sid_202034889, prod, sort_default
2 >>


Standard Shipping includes delivery by small parcel service. Processing time varies by product.

Orders for this item may be expedited for an additional fee.

Other Delivery Options:

Express and Expedited shipping options are also available. Estimated arrival times are available in checkout.

If product is eligible for shipping to AK, HI and US Territories additional transit time and remote surcharges may apply.