White-Rodgers 3098-156


#20, 48" Mercury Flame Sensor

3098-156 686067
Average Rating: 4.9
Read Reviews (7) Write a Review
$165.16+ 10 Business Day Shipping $9.16

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#20, 48" Mercury Flame Sensor


ItemMercury Flame Sensor
TypePlug In Replacement
Sensor Length48 Inches
Plug-In Bulb StyleNo. 20
Plug TypeThree Pin
Includes Adapter Fittings
Replaces White Rodgers models 3098-122, 3098-126, 3098-127, 3098-130, 3098-131, 3098-142, 3098-143, 3098-149, 3098-153, 3098-168, 3098-171, 3094-174, 3098-175, 3098-182
UPC 786710005305
Weight 1.000000


The White Rodgers 3098-156 Mercury Flame Sensor is for proving pilot flame and controlling main valves in cycle pilot applications. Features a #20 bulb style designed to fit with various OEM applications and replace #17 or #18 bulb styles. Includes adapter fittings to allow use of these mercury flame sensors with competitive burners. Forty-eight inch sensor allows unit to be mounted remotely on multiple-burner or adjacent to ignitor on other applications.

This item has been restricted from sale in the following states: IL, NH, NY
California Proposition 65 Warning: This product contains a chemical known to the State of California to cause birth defects or other reproductive harm.

Customer Reviews

Average Product Rating: 4.9
based on 7 reviews

Flame sensor

Thursday, February 07, 2013

First, the Web site is very good - providing a picture so I could be sure that it was what I wanted. Second, shipping was very fast. I ordered this as a spare for an old system, so I can't evaluate the item - but it looks identical.

I just need it for the heater to function.

Submitted by James R C

HVAC Parts

Tuesday, January 29, 2013

Product worked as advertised. I wish it was made in USA not China.

Replacement for an out dated part

Made in USA would be nice. I am willing to pay more for US parts, if there is an option.

Submitted by Mark C

Good website, good price, timely delivery

Tuesday, November 13, 2012

Useful website, tech help located item in stock... good price and delivery!

It works.

still not cheap... Over $100

Submitted by Jim S

Original Sensor

Tuesday, October 23, 2012

This is a vital part of a gas fired hot water baseboard heating system. Without it the furnace cannot start. The sensor detects the pilot flame in the furnace and when hot enough it opens the main gas valve to power the boiler.Thr saensors seem to deteriote after a few years-probably due to microscopic leaks in the pressure tube-which contains mercury. When a sensor fails in cold weather, the first job is to find a supplier who charges a reasonable price and delivers promptly. This was evidenced by DrillSpot who had a price about half that of local suppliers (typically $200)! DrillSpot's order was delivered fast and packaged properly thus ensuring that any repeat orders for this type of equipment will certainly go to them. Thank you DrillSpot for my warm workshop !!

Original manufacturer's item

Last longer than seven years

Submitted by D Cowell

Recieved in nice condition.

Thursday, October 20, 2011

The copper wire that is attached to the copper face of the 3098-149 switch on my Rheem furnace snapped right at the copper base. I couldn't re-solder, my iron did not get hot enough so took the switch apart, drilled a hole and inserted the copper tube and placed a bead of solder on the inside, it worked for one season. So my cheapness broke down and bought this new one 3098-156, which is a direct replacement. The thermocouple on this replacement is 10mm longer. I removed the "C" clip from the old one which was a pain in the butt (so small) and placed it in the appropriate spot on the new thermocouple (refer to the instructions). The difference between the spots on thermocouple to replace the "C" clip was either a little shorter or a little longer, there was no exact match. I chose a little longer and plug it in. The beautiful thing is that is pulls out and pushes in without having to take the ignition/pilot tube apart, took me longer to write this review than to do this whole job. I plugged the three prong plug into the gas valve and it fired right up. These thermal sensors should not be so expensive, the local parts store wanted $171 which is retail and I could buy a whole new Rheem 85% efficient furnace for $624 delivered (lol). Next year I may replace this 30 year old furnace myself of course.

Brand New, well built, copper wire was easy to unwound perfectly as to not create a mess or snap it off.

It could be cheaper

Submitted by Andy

Exactly What I Needed

Thursday, February 03, 2011

It's hard to find parts for my 35 year old heater... and this was exactly what I needed. The local parts store said it would take 3 weeks to get and you got it to me overnight...thank you!

Submitted by Laura J

Mercury Flame Sensor

Wednesday, January 19, 2011

Product arrive in a timely manner, and was the item I needed. It resolved the problem I had with my furnace. However, product did not come with the needed small C clips. It came with several adapters, but each of these required C clips which were not included. The C clips on the bad part were not reusable due to corrosion cause from many hot/cold cycles. The part receives extreme heat from the Pilot light flame. There is little chance the C clips could ever be reusable.

Product was what I need, fit the application, and resolved my problem.

Instruction sheet could be much better, and the missing C clips mentioned above.

Submitted by KEVAN R
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