Model # P321127

Internet #202034887

Store SKU #205183

Store SO SKU #1000676853

Williams Vent Limit Switch for Furnaces

Williams

Vent Limit Switch for Furnaces

$1740 /each
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Product Overview

The Williams Vent Limit Switch for Williams' Furnaces has gold-plated switch contacts. It senses the furnace vent temperature and shuts off the appliance if it is not venting correctly.

  • Senses the furnace vent temperature and shuts off the appliance if it is not venting correctly
  • Compatible with Williams' furnace models: 3508331, 3508332, 3508731, 3508732, 5008731, 5008732, 5508331, 5508332, 6508731, 6508732
  • Board-mounted design with switch mounted on the extension straps
  • Gold-plated switch contacts
  • Original factory part

Info & Guides

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Name Vent Limit Switch for Furnaces Terminal Block Thermocouple Universal 120-Volt Hot Surface Igniter Kit Gas Conversion Kit from Natural Gas to LP Gas for Model 3003622
Brand Williams Williams Williams
Ratings (11) (27) (1) (17)
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Specifications

Dimensions

Product Depth (in.)
1
Product Height (in.)
6
Product Width (in.)
2 in

Details

Brand/Model Compatibility
Select Williams Furnaces
HVAC application
Heating
Product Weight (lb.)
1lb
Returnable
90-Day

Warranty / Certifications

Manufacturer Warranty
Refer to Williams’ “Limited Warranty” for details.

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Customer Questions & Answers

What is the heat rating on this limit switch?

I am trying to replace a R330-60 on a Williams propane gravity heater (cuts off flame at 330*F, resuming when temp drops below 270*F) There is no description of the range on this product though it "looks" like it is the same part, can't see the other side where the rating is located!
Asked by: Peter
Answering my own question: YES it is a perfect fit and 330-60 rated
Answered by: Peter
Date published: 2016-12-18

Would this work for a trane furnace?

Asked by: Chris1
No, this limit switch is compatible with Williams' furnace models: 3508331, 3508332, 3508731, 3508732, 5008731, 5008732, 5508331, 5508332, 6508731, 6508732.
Answered by: CommunityAnswer
Date published: 2017-04-22
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Customer Reviews

Vent Limit Switch for Furnaces is rated 4.9 out of 5 by 11.
Rated 5 out of 5 by from Once installed, the furnace fired right up... Once installed, the furnace fired right up
Date published: 2017-05-24
Rated 5 out of 5 by from Just what I needed The vent switch on my heat I kept having shake it in order for the heater to come on I Google this part to see who have it in there Store only Home Depot had it and to order it online. My heater have been working every since I put the part on myself it's very easy to install yourself.
Date published: 2017-01-10
Rated 5 out of 5 by from Vent limit switch I ordered this part just by comparing photos to part I thought was malfunctioning & ended up getting exactly the part I needed & fixing the heater! Part came quickly for a reasonable price.
Date published: 2016-11-01
Rated 5 out of 5 by from Worked great, half the price of other stores. Fast easy pickup after I got the email it was deliv... Worked great, half the price of other stores. Fast easy pickup after I got the email it was delivered to local Home Depot. Thanks HD.
Date published: 2016-10-25
Rated 5 out of 5 by from Perfect replacement part I was having trouble with my Williams Propane gravity heater, finally narrowed it down to the vent limit switch going bad. Every other source was double the price and nobody had it in stock including HD but the order process was quick and easy and pickup was without a hitch. Easy install with a screwdriver and the heater is back in business! FYI this is 330-60 which is not mentioned, so it kicks off the gas at 330*F and resumes at 270*F (-60). When they go bad, erratic behavior and the flame can be restarted by "flicking" the metal sensor temporarily but you will need a new one ASAP.
Date published: 2016-02-23
Rated 5 out of 5 by from Exact replacement This is the exact replacement from the furnace manufacturer. It fit perfectly and works as it should. Remember to pich up the fireproof sealant when you are ready to install.
Date published: 2012-04-03
Rated 4 out of 5 by from Good replacement This seems to be better built than the original one which came with the furnace, because the connections to the temperature switch are welded instead of rivets which get loose over time and develop too high a resistance for the millivolt valve control circuit. Of course we'll know only in another 20 years, whether this is really an improvement .... if it still works in 10 years, I will give another star.
Date published: 2015-12-29
Rated 5 out of 5 by from Hard to find product at a great price The vent limit switch in the Williams wall heater in my rental goes out every few years. The labor to replace it is minimal, but the part is getting hard to find. None of the appliance parts stores in my area had the part or a source to get it. Good ole Home Depot had it in stock at their on-line store and had it in my hands in a couple of days. Oh yeah, the price was great too. Thanks, Home Depot, for the great customer service.
Date published: 2013-12-24
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