Model # R8184G4009

Internet #202294661

Store SKU #748779

Honeywell Protecto Relay


Protecto Relay

$10400 /each
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Product Overview

The Honeywell Protecto Relay provides intermittent ignition oil primary controls to operate the oil burner, oil valve (if desired) and the ignition transformer in response to a call for heat in oil burner systems. Manual trip safety switch lever and lockout indicator light is on the terminal strip which indicates system lockout. Has color-coded lead wires to make it easy for line voltage connections.

  • Integral transformer powers low voltage control circuit
  • Solid state flame-sensing circuit
  • Enclosed safety switch with external reset button, safety switch must be manually reset after safety shutdown
  • Exposed terminal strip with screw terminal for low voltage connections
  • Temperature range of -40 - 130 degrees Fahrenheit
  • Mounts on standard 4 in. x 4 in. junction box
  • Mounts on standard 4 in. x 4 in. junction box; select models may be mounted directly on burner housing
  • Click here for more information on Electronic Recycling Programs

Info & Guides

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Ratings (0) (11) (68) (20)
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Product Depth (in.)
Product Height (in.)
Product Width (in.)


Brand/Model Compatibility
HVAC application
Product Weight (lb.)

Warranty / Certifications

Manufacturer Warranty
1 year limited warranty

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Customer Questions & Answers

the Honeywell A8184g 4009 on my furnace continues to not function. My furnace is controlled by a programmable thermostat .

When the thermostat calls for heat the furnace does not come on. The r eset button on the top of the unit needs to be reset and the furnace fires and will do so over and over except when the furnace has been turned down for the night. Come morning the furnace does not fire up and the reset button on the A8184g relay needs to be reset. This happen over and over, the relay has been changed several times but the problem still exists. Furnace technicians have not solved the problem and sevceral have tried. Any help you can give will be appreciated.
Asked by: allan
can u tell if u have reliable AC power to the house? A short duration power failure while the furnace is running will trip out the relay. I installed a TDR (Time delay relay) in the thermostat line on mine. u can get one about $10.00 NO ONE seems to know about this issue including the furnace MFG.
Answered by: ruggb
Date published: 2016-05-22

does this product replace honeywell R8184g1286?

I have a Honeywell R8184g1286 unit on my boiler does the R8184G4009 replace this device with compatibility?
Asked by: Anonymous
not the same device
Answered by: scotty
Date published: 2015-09-17

Hi I reset the relay and NOTHING happened, after a few seconds the relay trip out

Asked by: Morris
Probably was a good relay with a bad light sensor. Get a new light sensor, or cad cell.
Answered by: PieceOFWork
Date published: 2017-07-04

What makes this unit malfunction. I have had to change three in the last 10 years.

What makes this unit malfunction. I have had to change three in the last 10 years.
Asked by: Eric
Hello Eric! I do apologize, but unfortunately, there are many reasons a Protecto Relay will malfunction. It could be the type of application, the wiring, the voltage. For further assistance, please feel free to contact the Honeywell Technical Support department at (800) 468-1502. Thank you.
Answered by: Honeywell Support
Date published: 2017-02-03
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Customer Reviews

Protecto Relay is rated 3.3 out of 5 by 11.
Rated 3 out of 5 by from Honeywell Primary burner control - I've been ripping these dinosaurs out and upgrading to the R72... Honeywell Primary burner control - I've been ripping these dinosaurs out and upgrading to the R7284. I have about 5-6 of these dust collectors thrown in a corner of my basement shop. The Honeywell R7284 is a better control. It is user programmable and will give you helpful error messages to aid in troubleshooting if a lockout occurs.
Date published: 2017-08-06
Rated 5 out of 5 by from 5 Star Review Rating provided by a verified purchaser
Date published: 2017-04-22
Rated 5 out of 5 by from 5 Star Review Rating provided by a verified purchaser
Date published: 2017-04-04
Rated 5 out of 5 by from Great quality unit. Easy to install.... Great quality unit. Easy to install.
Date published: 2017-05-16
Rated 4 out of 5 by from Quality product, but defective soldering I had two of these fail on same furnace in 4 years. Solder joint failure on board at relay switching contacts. Factory should make sure relay prongs are clean before soldering and then make sure full solder pad is soldered - not just partially as I have seen.
Date published: 2013-01-21
Rated 3 out of 5 by from Works okay I bought this out of necessity as I couldn't find another to replace this one. Bought an old house with an old furnace but this unit looked new. It gave out on us a few months later. New one works fine, while it's working.
Date published: 2016-11-29
Rated 1 out of 5 by from Junk only lasted two weeks... Junk only lasted two weeks
Date published: 2017-01-17
Rated 3 out of 5 by from protecto relay poor Relay only last for me 1 1/2yr. maybe 2 that's it at the most.Even the guy who cleans my furnace said don't last long any more either . Why ?? But gotta have one .... On my 4th or 5 th. one now.. I would you recommend this product ,only because I need it.Couldn't find another type to take it's place works," but not long..":( Now it's $100.00 at Home Depot )
Date published: 2014-05-05
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