Want to Solve your Dometic & Norcold Cooling and Safety Issues?

The Fridge Defend® solves the root-cause resulting in the failure of these otherwise great refrigerators.

The Fridge Defend® is the most effective solution for Dometic and Norcold refrigerators, it solves cooling issues while helping to save lives and property due to RV fridge fires.

Worn down by issues with recalls such as 'no co' or fridge shut downs for no apparent reason? The Fridge Defend is the best solution for keeping your fridge cool in hot weather while avoiding these recall problems. When the Fridge Defend is on duty, and maintained properly, it not only saves lives and property, it can be the difference between a fun outing, and a disastrous and troubled vacation.

Please see next video and click to contribute to a victim of refrigerator fire

Dometic and Norcold absorption refrigerators are driven by a fired boiler. It is considered good engineering practice to monitor fired boilers for thermal run away conditions with a safety controller. The patented v5.x Fridge Defend is an accessory IEC type safety controller that uses standards, including applicable ( and practical ) IEC 60730 automatic electrical control checks, combined with functional self-tests to provide an economical, yet functional safety control.

Get the Fridge Defend - be COOL be SAFE!

LET US KNOW HOW WE CAN HELP?: ARP wants to help with all your needs for Dometic and Norcold refrigerators. If you cannot find what you are looking for please use the Contact Us form.

Paul and Mao Unmack, Fridge Defend

Who are We?
Why our Product is Praiseworthy

Paul and Mao Unmack are practitioners of engineering science that have committed themselves to RV safety. We are not sales people, we do not push product you do not need. We at Fridge Defend hold paramount the safety, health, and welfare of the public. This website is presented only in an objective and truthful manner and is based on sharing our extensive RV experience.

Read on to be motivated by the praise from both Dometic and Norcold, top RV advisors, all combined with customer testimonials, the foundation of any praiseworthy product that provides value.


Both Dometic and Norcold RV refrigerators are fine products. But, as you must know, there have been many recall campaigns due to fire issues. Even if your fridge has not been recalled, let's say it is a newer fridge, your fridge has one of these so called safety recalls on it from the factory.

Dometic Recall Norcold Recall
Fires & Explosions Letter from Norcold Explaining Recall
VIDEO: Dometic Recall - How it Works VIDEO: Norcold 1200 Recall - How it Works
Dometic Recall in a Nutshell - What it Accomplishes VIDEO: Norcold 6xx, 8xx, & 1095 Recall - How it Works

The Fridge Defend solves the root-cause resulting in the failure of these otherwise great refrigerators.

The primary root-cause of RV fridge failure that leads to fires is the overheating of the boiler. Dometic and Norcold did the analysis, clearly overheating promotes corrosion and in turn reduces service life of the fridge.

The above video shows a boiler rust pit measured by a Leica Electron Microscope. The microscope calculates the rust pit as being what caused the failure that lead to a fire in this fridge. Science presents the facts, no argument here! Cause of fire, just as Dometic and Norcold state in their documents, damage from overheated boiler.

Click to see same boiler as seen above used to make Dometic & Norcold Agree video.

Unfortunately, manufacturer recalls only respond to overheating of the boiler after it has happened, for the proof jump down on this page to PROOFS from DOMETIC & NORCOLD — FRIDGE DEFEND is the BEST PROTECTION.
The Fridge Defend is the only solution which prevents boiler overheating and the damage it causes.
No other recall or method can make this claim because the Fridge Defend is patented & meets international safety standards.

According to Brett Wolfe, FMCA Technical Advisory Committee, Diesel Pushers & Caterpillar RV Engine Advisor:
"At this point I see the choices for safe, reliable RV refrigeration to be: Dometic or Norcold with a Fridge Defend, the Fridge Defend materially reduces the inherent safety risks associated with absorption gas refrigeration, including fire hazards, gas leaks, and explosions. Or a residential refrigerator."


Dometic Engineering Document (Page 16 & 55)

"The whole unit [refrigerator] operates by the heat applied to the boiler system and, for a good operation, it is of paramount importance that this heat is kept within the necessary limits and is properly applied."

Click here for entire Dometic Engineering Document

Norcold Patent Application 13/279,361 (Par. ¶ 0036)

"Preventing the boiler from operating at high temperatures can avoid consumption of sodium chromate ... the cooling arrangement temperature sensor can be positioned on the boiler tube."

Click Norcold's failed attempt to re-patent Fridge Defend

Norcold (Par. ¶ 0025) Backs Up Dometic (Page 57) & Fridge Defend Documentation

"It is desirable to operate the [boiler] heat sources of the cooling arrangement within an optimum temperature range" + "[boiler] temperature is believed to be the single most important factor for corrosion."

Click here to read more from Norcold

Dometic (Page 25 & 67) Backs Up Norcold & Fridge Defend Documentation

"This is also a matter of product safety ... [refrigerator] life length is in other words critical both for customer satisfaction and product safety". "The corrosion rate is increased when the boiler temperature is increased."

Click here for entire Dometic Engineering Document


Dometic and Norcold Facts

The Fridge Defend monitors "the corrosion reaction rate [which] depends on temperature and flow conditions.", where flow conditions determine the production of refrigerant by the boiler of Dometic and Norcold RV refrigerators. Thus, it is confirmed, the root cause of failure is solved, which is also confirmed by the science of temperature dependence of reaction rates, and years 1930 through 1999 Dometic/Electrolux document chronology.
What more proof is needed?

The Fridge Defend not only saves you money and valuable vacation time, while giving you added life and property protection, it protects the "environment"! Best of all, the Fridge Defend re-starts the fridge after a protection cool down period, so that your food doesn't spoil. All without any effort by you!
Dometic Engineering Document (Page 17 & 20)

Click here to see video that shows the facts from Dometic & Norcold statements .

Being a retired fire chief, I know the value of fire prevention and also know firsthand the destruction, loss of life, pain, and agony that can go along with accidental and unwanted fire. So I strongly endorse the Fridge Defend by ARP for anyone who has an absorption RV refrigerator.
Mike Burger, Kochville Fire Chief (Ret.)
I am very happy with the Fridge defend and the support Paul & Mao provide.
The ARP improves safety and reliability, and that’s a great gadget!
Mark Nemeth, Escapees RV Club Technical Advisor
Last summer we had a series of flat tires on our 5th wheel. We never worried about our fridge when the trailer was not level on the side of the road. The Fridge Defend protected the fridge from overheating damage, which shortens the life of the fridge. Bob Livingston RV/MH Hall of Fame & Editor Trailor Life Magazine
To me the ARP Controller is a requirement.
I would not operate a Dometic or Norcold RV fridge without the protection the Fridge Defend offers. Brett Wolfe
FMCA Technical Advisory Committee, Diesel Pushers & Caterpillar RV Engine Advisor

The Fridge Defender is the best aftermarket item sold today, it is truly a value for anyone with a Dometic or Norcold fridge. You will sleep better knowing such a quality product is helping protect your cooling unit and your safety. Phillip Enoch, RV Inspector & Technician
While in OH, we attended an RV Rally. As usual we leveled our RV, but the leverlers sank into the graound. The Fridge Defend prevented our referigerator from overheating due to being off-level. Thanks Paul & Mao for a great product! JVAndrews, Retired Aeronautical Engineer - USAF

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Recalls & NO CO
Fridge Prevention Monitor

Many users of RV refrigerators that operate on propane gas have had issues with error codes & recalls. Often it is a problem to do a reset, or even know why these devices require troubleshooting in the first place. Knowing how an RV gas electric fridge works helps one understand how the Fridge Defend can be a solution to these problems.

About Fault Codes
Error Codes & Fridge Not Cooling

Because the Fridge Defend solves problems before they happen by directly monitoring the production of coolant for your RV refrigerator, the Fridge Defend is the first device that will detect the temperature control issues that the recalls were supposed to help with. For example, the NO CO error simply detects if the fridge interior does not cool for 2 hours. In 2 hours your fridge can be destroyed if it does not produce refrigerant!

Please view our 'how does a fridge work video' to understand how the Fridge Defend solves the RV fridge not cooling problems. Then see our 'Dometic & Norcold agree video' to guide you as to why the NO CO error is generally resolved by the Fridge Defend. See the letter from Norcold to us explaining the refrigerator recall and how the Fridge Defend temperature monitor will always respond immediately, as opposed to the recall 2 hour response. Lastly, the Fridge Defend restarts your fridge rather than allowing your food to spoil, this avoids taking the fridge to an RV tech to do an RV refrigerator reset.

The Fridge Defend solves the following events that can send the boiler temperature sky-rocketing:

Click here for Fire Photo Top of this Page

Dometic and Norcold Fridge Defend Basic or Fan Controller
Fridge Defend by ARP Rated
4.8 stars based on 143 customer reviews

What Products are Offered by ARPC LLC?

Product Description: We have two models of controller, the Basic Fridge Defend & Fridge Defend + Fan Control. Both controls protect the cooling unit by monitoring the boiler temperature. The Fridge Defend + Fan Control has an an additional fan controller which improves the fridge efficiency. Fridge Defend products range in price from $147.50 to $225.00

Please click here to go to our customer review/rating page.

Fridge Defend by ARP Improves Safety, Reliability, and Efficiency


★ ★ ★ ★ ★


Winnebago Sightseer 35N - 2006

ARP + Fan Control

Star Rating: Super great service. Paul went out of his way help me while I installed the ARP Basic unit in a friends Class A motor home. I installed an ARP with fan control in my Class A MH. I just love how the Fan Control has improved the cooling in my Norcold.

So what is up with the bar graphs and the testimony from LaPlatrosa?
Out of the total number of customer ratings, these graphs show how many people that bought the Fridge Defend by ARP and felt that their family was safer, their fridge was more reliable, and that the ARP + Fan Control made their fridge more efficient. Please note that none of the pets that were left alone in the RV reported , but an independent survey (the dog next door) stated that 100% of pets insist their master is goofy if they do not purchase a Fridge Defend by ARP Control for safety. LaPlatrosa left this review of the ARP Control on 9/5/2015, we love Happy Campers!

Please Click Here for more Testimonials  & See these comments from the Grand Design Owners Forum

Escapees Gadget Box Supports ARP Control

Please click image to left to see RV Gadget Box article from Escapees magazine, May/June 2014. Reprint courtesy of Escapees RV Club.
Please click here for Mark Nemeth's RV Gadget Box article May 2014

Please click here for RV Gadget Box article May 2017

Please click here for Mark My Words Good Sam Club Blog


Stop RV refrigerator fires before they start! -- RVtravel.com

Click here to see this article by Russ and Tiña De Maris about stopping refrigerator fires

Revised RV refrigerator safety device protects against fires

Click here for Press Release on v5.x Fridge Defend -- RVtravel.com

Nordic Coolig Units -- Cooling Unit Used in Above Article

Click here for Nordic Cooling Units

See Comments in this Article about Fridge Defend

Refrigerator failure: Replace or repair?

Escapees RV Club Supports ARP Control

We are pleased to be Escapees members. Escapees club is an advocate for all RV'ers, they truly care for the welfare of their members.


Fridge Defend by ARP and other high quality RV vendors supported by Escapees.

RV Forum

The friendliest place on the web for anyone with an RV or an interest in RVing.

Click here for "Another Cooling Unit -- Saved us from more serious problems, like a cooling unit fire"
FMCA Supports ARP Control

We are pleased to be FMCA commercial members.

See Brett Wolfe, FMCA Technical Advisory Committee, testimonial above. Click here to see FMCA blog Fridge Defend by ARP Control - "we believe the ARP provides the best level of safety against potential refrigerator fires".


We support IRV2, and the participants of IRV2 support us, click here for very informative video on RV fridge fires!


The ARP Control introduces an improved method for protecting your Norcold or Dometic fridge while maintaining the original warranty ( Further reading see Magnuson-Moss Warranty Act ). The Fridge Defend pro-actively protects your fridge rather than responding after a failure has occurred such as the present recalls do. This is an improvement upon factory control methods, thus Magnuson–Moss Warranty Act insures that you can improve your safety. ( Also see: Restore Factory Settings )