2000 Monaco Coach Diplomat Problems
Owner-reported complaints filed with NHTSA, grouped by component
Data refreshed
What this page shows
Everything below is an owner-reported complaint submitted to NHTSA about the 2000 Monaco Coach Diplomat, grouped by the component NHTSA recorded on the report. These are not confirmed defects, and they are not recalls. NHTSA does not verify most reports before publishing them, and a category with more reports in it is not evidence that a part is defective.
Complaints are reports submitted by owners and drivers to NHTSA. They are not verified and do not establish that a defect exists.
Reports by component
Ranked by how many owner reports name each component category
- Body & structure635.3%
- Visibility317.6%
- Electrical211.8%
- Other / unspecified211.8%
- Interior & seats15.9%
- Suspension15.9%
- Tires & wheels15.9%
- Heating & air conditioning15.9%
Percentages are of component mentions. A single complaint can name more than one component, so these do not sum to the total complaint count.
Each component in detail
What the reports in each category say, in the owners' own words
Body & structure
Reports naming the vehicle structure, frame, body panels, doors, hood and trim.
From owner reports, verbatim
ON 10/15/02 WHILE DRIVING MY RV TO A CAMPGROUND, I DETECTED A VERY STRONG ODOR OF ANTIFREEZE INSIDE THE RV AND NOTICED WETNESS ON THE CARPET NEAR THE FIRE WALL. IT RENDERED THE DEFROSTING OF THE FRONT WINDSHIELD NIL AND COULDN'T HARDLY SEE OUTSIDE AND DAMAGE THE SIDE COMPARTMENT OF THE R.V. THE UNIT WAS UNDER WARRANTY AND MONACO REPLACED THE DAMAGED HEATER CORE ON 12/23/02. ON 1/20/08 ON A TRIP TO ORLANDO THE SAME PROBLEM OCCURRED AGAIN. I ALMOST PASSED OUT AT THE WHEEL BECAUSE OF THE STRONG ODOR OF ANTIFREEZE LEAKING AGAIN INSIDE THE COACH. SAME PROBLEM: SPITED HEATER CORE. THE PLUMBING OF HEATER IS INCORRECT AND MONACO REFUSE TO ACKNOWLEDGED THE PROBLEM. *TR
DT*: THE CONTACT STATED WHILE DRIVING 55 MPH ON NORMAL ROAD CONDITIONS, THE RV'S WINDSHIELD CRACKED AND BECAME LOOSE. THE INCIDENT HAPPENED AFTER A YEAR OF OPERATION. THE WINDSHIELD WAS REPLACED AT A VEHICLE GLASS SHOP. THE DEALERSHIP DID NOT ASSUME ANY RESPONSIBILITY OVER THE WINDSHIELD FAILURE. THE CONSUMER STATED THE WINDSHIELD MOVED OVER AN INCH. UPDATED 09/20/06. *JB
Too few reports in this category for a page of its own — they appear in the full complaint list.
Visibility
Reports naming windshields, glass, wipers, defrosters and mirrors.
From owner reports, verbatim
ON 10/15/02 WHILE DRIVING MY RV TO A CAMPGROUND, I DETECTED A VERY STRONG ODOR OF ANTIFREEZE INSIDE THE RV AND NOTICED WETNESS ON THE CARPET NEAR THE FIRE WALL. IT RENDERED THE DEFROSTING OF THE FRONT WINDSHIELD NIL AND COULDN'T HARDLY SEE OUTSIDE AND DAMAGE THE SIDE COMPARTMENT OF THE R.V. THE UNIT WAS UNDER WARRANTY AND MONACO REPLACED THE DAMAGED HEATER CORE ON 12/23/02. ON 1/20/08 ON A TRIP TO ORLANDO THE SAME PROBLEM OCCURRED AGAIN. I ALMOST PASSED OUT AT THE WHEEL BECAUSE OF THE STRONG ODOR OF ANTIFREEZE LEAKING AGAIN INSIDE THE COACH. SAME PROBLEM: SPITED HEATER CORE. THE PLUMBING OF HEATER IS INCORRECT AND MONACO REFUSE TO ACKNOWLEDGED THE PROBLEM. *TR
DT*: THE CONTACT STATED WHILE DRIVING 55 MPH ON NORMAL ROAD CONDITIONS, THE RV'S WINDSHIELD CRACKED AND BECAME LOOSE. THE INCIDENT HAPPENED AFTER A YEAR OF OPERATION. THE WINDSHIELD WAS REPLACED AT A VEHICLE GLASS SHOP. THE DEALERSHIP DID NOT ASSUME ANY RESPONSIBILITY OVER THE WINDSHIELD FAILURE. THE CONSUMER STATED THE WINDSHIELD MOVED OVER AN INCH. UPDATED 09/20/06. *JB
Too few reports in this category for a page of its own — they appear in the full complaint list.
Electrical
Reports naming the electrical system — wiring, battery, charging, control modules, infotainment and electrical accessories.
From owner reports, verbatim
WHILE DRIVING THE COACH LOST ALL POWER, THE ENGINE SHUT DOWN, POWER STEERING AND ALL ELECTRICAL SYSTEMS, AFTER STOPPING, CONSUMER CONTACED THE MONACO TECHNICAL ASSISTANCE AND WITHOUT ANY CROSS EXAMINATION THE PROBLEM WAS IDENTIFIED AS A WEAK RELAY, A NEW RELAY WAS SHIPPED TO CONSUMER AND WAS INSTALLED, WHICH CORRECTED THE PROBLEM. CONSUMER ALSO STATES WHILE PARKED AND CONNECTED TO SHORE POWER, THE INVERTER CHARGING SYSTEM OVERCHARGES THE BATTERIES TO THE EXTENT THAT THE BATTERY WATER BOILS OUT, AND THE BATTERY COMPARTMENT BECOMES EXTREMELY HOT, CONSUMER STATES FOUR INVERTERS HAVE BEEN INSTALLED WITH NO CHANGE IN OPERATION, THE OVERCHARGING PUTS IN EXCESS OF 15 VDC TO ALL SYSTEMS WITH THE RESULT THAT SEVERAL CASES OF SHORTS AND BURNOUTS HAVE OCCURED WITH THE POSSIBILITY OF FIRE.*YH
WHILE DRIVING AND WITHOUT ANY WARNING MOTORHOME JUST DIED. MOTORHOME WAS TOWED TO DEALERSHIP. DEALERSHIP REPLACED TWO ELECTRICAL PARTS. THE DELAER WAS NOT SURE WHAT CAUSED THE PROBLEM. PLEASE PROVIDE ANY FURTHER INFORMATION*AK.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Other / unspecified
Reports whose component NHTSA recorded as unknown, or that do not map to one of the categories above.
From owner reports, verbatim
THIS INVOLVES A NORCOLD 1200 LRIM REFRIGERATOR AND A 2000 MONACO DIPLOMAT 40 PBD MOTORCOACH. WHEN THE REFER WAS REMOVED TO CONDUCT THE RECALL WORK, IT WAS FOUND TO HAVE CAUGHT FIRE PREVIOUSLY, AND HAD SIGNS OF SERIOUS OVERHEATING, CAUSING THE CASE OF THE REFRIGERATOR TO PARALYZE (ALUMINUM FOIL COATING, PAPER BACKING AND FOAM INSULATION BEHIND FLUE TUBE). FURTHER A FIRE HAD OCCURRED ON THE TOP OF THE FLUE TUBE, WHERE FIBERGLASS INSULATION FROM THE COACH HAD BEEN IN CONTACT WITH THE TOP OF THE FLUE TUBE, CAUSING CHARRING TO THE INSULATION AND CEILING OF THE COACH, WITH THE EARLY STAGES OF PARALYSIS SETTING IN ON THE CEILING MATERIALS (FOAM AND OZITE CARPET COVERING). PHOTOS OF EVERYTHING WERE TAKEN, AND NORCOLD DENIED CULPABILITY, STATING THAT THE COOLING UNIT HAD NOT "BEEN A LEAKER" AND THAT MAINTENANCE HAD NOT BEEN DONE, WHICH IS NOT COMPLETELY TRUE, ALTHOUGH SOME MAINTENANCE ITEMS WERE NOT PERFORMED ACCORDING TO THE OWNER'S MANUAL (REMOVAL OF THE REFER FROM THE COACH AND SERVICING THE FLUE TUBE). MY CONCERNS ARE 1)OVERHEATING OF THE COOLING UNIT/FLUE TUBE DURING NORMAL OPS WITHOUT FAILURE OF THE COOLING UNIT (RECALL) AND 2) INCORRECT INSTALLATION OF REFER IN CABINET/INSTALLATION OF INSULATION WHICH LED TO CONTACT WITH SAID MATERIALS AND SLOW PARALYSIS/IGNITION. THIS COULD BE A CONDITION IN ALL OF THESE COACHES. *TR
THE MOTORHOME IS EQUIPPED WITH A SLIDE OUT THAT CONTAINS A LOCKING DEVICE TO SECURE DURING TRAVEL, HOWEVER THE DESIGN AND INSTALLATION WERE BOTH INADEQUATE RESULTING IN THE RELEASE OF THE SLIDE OUT WHILE CONSUMER WAS TRAVELING, CONSUMER INSTALLED ANOTHER ADDITIONAL LOCKING DEVICE TO SECURE PROPERLY. *MJS
Too few reports in this category for a page of its own — they appear in the full complaint list.
Interior & seats
Reports naming seats, latches, locks, linkages and interior fittings.
From owner reports, verbatim
WHILE DRIVING THE COACH LOST ALL POWER, THE ENGINE SHUT DOWN, POWER STEERING AND ALL ELECTRICAL SYSTEMS, AFTER STOPPING, CONSUMER CONTACED THE MONACO TECHNICAL ASSISTANCE AND WITHOUT ANY CROSS EXAMINATION THE PROBLEM WAS IDENTIFIED AS A WEAK RELAY, A NEW RELAY WAS SHIPPED TO CONSUMER AND WAS INSTALLED, WHICH CORRECTED THE PROBLEM. CONSUMER ALSO STATES WHILE PARKED AND CONNECTED TO SHORE POWER, THE INVERTER CHARGING SYSTEM OVERCHARGES THE BATTERIES TO THE EXTENT THAT THE BATTERY WATER BOILS OUT, AND THE BATTERY COMPARTMENT BECOMES EXTREMELY HOT, CONSUMER STATES FOUR INVERTERS HAVE BEEN INSTALLED WITH NO CHANGE IN OPERATION, THE OVERCHARGING PUTS IN EXCESS OF 15 VDC TO ALL SYSTEMS WITH THE RESULT THAT SEVERAL CASES OF SHORTS AND BURNOUTS HAVE OCCURED WITH THE POSSIBILITY OF FIRE.*YH
Too few reports in this category for a page of its own — they appear in the full complaint list.
Suspension
Reports naming suspension components — springs, struts, shocks, control arms and related hardware.
From owner reports, verbatim
THE SLIDEOUT ROOM RETAINING CLAMPS ("TRAVEL LOCKS") CAUSE A DANGEROUS SITUATION. I WAS HIT, (NEARLY ON THE BACK OF THE HEAD) BY A LOOSE "TRAVEL LOCK" WHICH VIBRATED OUT OF PLACE DUE TO SLIDEOUT ROOM VIBRATION. THERE IS NO _POSITIVE_ MEANS OF SECURING THE CLAMP (TRAVEL LOCK) IN PLACE... ONLY FRICTION. THE CLAMP (TRAVEL LOCK) JUST VIBRATES OUT OF POSITION AS THE SLIDEOUT ROOM VIBRATES WHEN THE COACH TRAVELS DOWN THE ROAD. MONACO DOES NOT PROVIDE INSTRUCTIONS OR DIAGRAM OF SLIDEOUT LOCK INSTALLATION. THE (CLAMP TRAVEL LOCK) WAS INSTALLED AT DELIVERY TO FIT BETWEEN THE METAL FLANGE OF THE SLIDEOUT AND THE WALL. MONACO'S SUGGESTION TO TIGHTEN THE CLAMP ANY MORE WOULD MAKE IT IMPOSSIBLE TO FIT. MONACO'S SUGGESTION TO ADJUST THE LOCK SO IT FITS BETWEEN THE WOOD FASCIA AND WALL IS MEANINGLESS SINCE, AT THE LARGEST ADJUSTMENT, THE CLAMP (TRAVEL LOCK) IS STILL 1 1/2" TOO SHORT. MONACO SHOULD PROVIDE TRAVEL LOCKS WITH A POSITIVE MEANS OF SECURING IN PLACE, NOT JUST FRICTION.*AIK
Too few reports in this category for a page of its own — they appear in the full complaint list.
Tires & wheels
Reports naming tires, wheels, hubs, or the tire-pressure monitoring system.
From owner reports, verbatim
WHILE DRIVING AT 65 MPH AND WITH NO WARNING FRONT RIGHT TIRE TREAD SEPARATED, CAUSING THE TIRE TO BLOWOUT, AND DAMAGE THE VEHICLE. THIS HAPPENED IN DECEMBER 2002. ON JUNE 14 2003, WHILE DRIVING AT 65 MPH , LEFT FRONT TIRE TREAD SEPARATED, CAUSING A BLOWOUT. CONSUMER HAD TO PULL OVER, AND TOWED THE MOTOR HOME. GOODYEAR G159, SIZE R255/70 R22.5. THERE ARE A POLICE REPORT AND PICTURES. *AK *NM
Too few reports in this category for a page of its own — they appear in the full complaint list.
Heating & air conditioning
Reports naming the heating, ventilation and air-conditioning system.
From owner reports, verbatim
CONSUMER HAS A TEN GALLON GAS OR ELECTRIC ATWOOD WATER HEATER (MODEL # GC10A-32 SERIAL # 941130430) WHEN PUT ON PROPANE WITH THE WIND BLOWING TOWARDS IT, IT TESTED TO 70 PARTS PER MILLION IN 15 MINUTES. *TT
Too few reports in this category for a page of its own — they appear in the full complaint list.
Higher-selling and older vehicles accumulate more reports. Counts are not failure rates and are not directly comparable between vehicles that sold in very different numbers.
Elsewhere on this vehicle
Data sources
- NHTSA Office of Defects Investigation — owner-reported complaints and the components recorded on them
Data on this page last refreshed .