Electrical System. Review the 1 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
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NHTSA owner reports · September 18, 2026 snapshot.

0 crash reports1 fire reports0 injury reports

Electrical System complaints

1 reports

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21,500 miles · Mar 4, 2014

Electrical SystemFire

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CLASS A MOTORHOME HAS A 110V AUTOMATIC TRANSFER SWITCH (ATS) THAT PROVIDES EITHER SHORE POWER OR ON-BOARD GENERATOR POWER TO THE COACH POWER DISTRIBUTION CENTER. THOR INDUSTRIES USED AN IOTA ITS-50R ATS ON THIS AND SEVERAL OTHER MATRON BRANDS WITHIN THEIR BUSINESS. THIS ATS BY IOTA HAS BEEN IMPLICATED IN SEVERAL ELECTRICAL FAILURES INCLUDING SMOKE AND SMALL CONTAINED FIRES AND WAS THE SUBJECT OF NHTSA RECALL 12V060000. THE REFERENCED RECALL PERTAINED TO NAVISTAR INC. DBA MONACO RV LLC WHEREIN NAVISTAR REPLACED THE DEFECTIVE ATS WITH A DIFFERENT BRAND SWITCH ON TWELVE DIFFERENT MATRON BRAND NAMES AFFECTING APPROXIMATELY 250 UNITS. THIS IOTA ITS-50R ATS FAILED IN THE SUBJECT MATRON ON 12/25/2013 RESULTING IN SMOKE DAMAGE AND SECONDARY DAMAGE TO WIRING AND OTHER COMPONENTS WHILE THE COACH WAS PLUGGED INTO A PROVEN SHORE POWER SOURCE. THE DANGER/HAZARD IS THAT THE ONBOARD GENERATOR IS USED DURING DRIVING IN HOT WEATHER TO POWER THE COACH AIR CONDITIONERS AND THE ATS COULD (AND APPARENTLY HAS) FAILED CAUSING A FIRE AND ACCIDENT. THERE IS ANECDOTAL EVIDENCE THAT OTHER MANUFACTURERS HAVE ENCOUNTERED THE SAME PROBLEM WITH THIS ATS BUT TO WHAT EXTENT IS UNKNOWN. THOR INDUSTRIES/THOR MOTORCOACH/FOUR WINDS EITHER DID OR SHOULD HAVE BEEN AWARE OF THIS TECHNICAL ISSUE FROM THEIR INDUSTRY SOURCES. LUCKILY WE WERE PARKED AT THE TIME AND IN CHURCH BUT OUR BELOVED DOGS SUFFERED FROM SOME TEMPORARY SMOKE INHALATION PROBLEMS. IN MY JUDGEMENT THESE ATS UNITS SHOULD BE REMOVED FROM SERVICE AND BANNED UNTIL A PROVEN REDESIGN IS AVAILABLE.

NHTSA ODI #10567361

Official recalls

15V745000 · Equipment:recreational Vehicle/trailer

Nov 10, 2015

Thor Motor Coach (Thor) is recalling certain model year 2011-2016 Thor Challenger, Thor Citation, Thor Hurricane, Thor Tuscany, Thor Windsport, 2011-2012 Thor Astoria, Thor Avanti, Thor Chateau, 2011-2014 Thor Daybreak, 2011-2015 Thor Outlaw, Thor Siesta, 2014-2015 Thor Miramar, 2012 Thor Four Winds, 2008-2011 Damon Astoria, Damon Daybreak, Damon Outlaw, Damon Tuscany, 2008-2012, Damon Challenger, 2008-2010 Damon Essence, 2009-2011 Damon Avanti, Four Winds Chateau, Four Winds Citation, Four Winds Four Winds, Four Winds Hurricane, Four Winds Siesta, Four Winds Windsport, 2009-2010 Four Winds Dorado, Four Winds Dutchmen, Four Winds Magellan, Four Winds Mandalay and 2009 Four Winds Fun Mover, and Four Winds Presidio motorhomes. The affected vehicles are equipped with certain Lippert-brand Coachstep Double and Triple Electric Steps. These steps use a bolt to attach the fan gear assembly to the steps. This bolt may fracture allowing the fan gear to disengage from the steps. As a result, the steps may not remain in the expected position and may be unstable.

Consequence & remedy

Consequence: Unstable entry and exit steps increase the risk of injury.

Remedy: Thor will notify owners, and dealers will install a retainer bracket to reinforce the operating mechanism and replace all of the affected bolts, free of charge. The recall began on January 6, 2016. Owners may contact Thor customer service at 1-877-855-2867. Thor's number for this recall is RC000111.

15V698000 · Electrical System

Oct 23, 2015

Thor Motor Coach (TMC) is recalling certain model year 2009-2011 Four Winds Hurricane and Windsport, 2009-2010 Four Winds Mandalay, 2010 Four Winds Magellan, and 2010-2011 Four Winds Serrano motorhomes manufactured May 2, 2009, to September 1, 2010. The affected vehicles are wired to be powered by a generator and are equipped with an Iota ITS-50R transfer switch that may fail when exposed to elevated electrical loads and used in higher ambient temperatures.

Consequence & remedy

Consequence: As the transfer switch fails, it may overheat, increasing the risk of a fire.

Remedy: TMC will notify owners, and dealers will replace the Iota ITS-50R transfer switch with a transfer switch from another manufacturer, free of charge. The recall began on November 23, 2015. Owners may contact Thor customer service at 1-877-855-2867. Thor's number for this recall is RC000106.

11V058000 · Fuel System, Gasoline:storage:tank Assembly

Jan 25, 2011

THOR MOTOR COACH IS RECALLING CERTAIN MODEL YEAR 2007-2010 DAMON CHALLENGER, MODEL YEAR 2008-2009 CHALLENGER PLATINUM, MODEL YEAR 2007-2011 DAYBREAK, MODEL YEAR 2010 DAYBREAK CLASSIC, MODEL YEAR 2009-2010 DAYBREAK SPORT, MODEL YEAR 2007-2009, OUTLAW AND MODEL YEAR 2011 FOUR WINDS HURRICANE, RECREATIONAL VEHICLES MANUFACTURED FROM MARCH 2007, THROUGH AUGUST 2008. THE FUEL-FILL CAP ASSEMBLIES USED TO SEAL THE UNUSED SIDE OF THE DUAL-FILL GASOLINE FUEL TANK WERE PRODUCED WITH A HOSE MATERIAL THAT DID NOT MEET DESIGN SPECIFICATIONS. DURING NORMAL USAGE THE HOSE MATERIAL MAY DETERIORATE WHICH MAY RESULT IN FUEL LEAKS.

Consequence & remedy

Consequence: A FUEL LEAK INCREASES THE RISK OF A FIRE WHICH MAY RESULT IN PROPERTY DAMAGE, PERSONAL INJURY, OR DEATH.

Remedy: NAVISTAR/WORKHORSE IS HANDLING THE REMEDY AND OWNER NOTIFICATION FOR THIS CAMPAIGN PLEASE SEE NAVISTAR/WORKHORSE'S DEFECT REPORT 10V-348. NAVISTAR/WORKHORSE WILL REPLACE THE ORIGINAL FUEL-FILL CAP ASSEMBLIES WITH ONES ASSEMBLED WITH HOSE MATERIAL THAT MEETS DESIGN SPECIFICATIONS. THIS SERVICE WILL BE PERFORMED FREE OF CHARGE. OWNERS MAY CONTACT NAVISTAR AT 1-260-461-1890.

Model-level recall history does not show whether a particular VIN is affected or has received a repair. Check a VIN with NHTSA ↗

NHTSA investigations

No exact-year investigations in this snapshot.