Newmar RV Problems: 7 Common Issues and How to Address Them

Newmar RVs are renowned for their luxurious amenities, innovative features, and high-quality craftsmanship. However, like any recreational vehicle, they are not immune to occasional problems that may arise during ownership. In this comprehensive article, we will explore seven common Newmar RV problems and provide detailed solutions to address them effectively, ensuring a hassle-free RVing experience.

7 Newmar RV Problems

Now, let’s dive straight to the most common issues that Newmar RV owners encounter from time to time:

Problem #1: Electrical System Malfunctions

Electrical system malfunctions can manifest in various ways, such as power fluctuations, faulty outlets, non-functional appliances, or blown fuses. These issues can cause inconvenience and disrupt the overall functionality of your Newmar RV.


  • Wiring issues or loose connections: Over time, vibrations from the road and regular usage can cause wires to become loose or connections to weaken.
  • Overloaded circuits: If you are using multiple high-power appliances simultaneously, it can overload the circuits and lead to power fluctuations or blown fuses.
  • Battery problems or inadequate charging: Weak or faulty batteries, or insufficient charging from the power source, can result in electrical malfunctions.
  • Defective inverters or converters: Inverters or converters that are damaged or not functioning properly can affect the distribution of electricity in your RV.


  • Inspect and tighten all electrical connections regularly: Periodically check the wiring connections throughout your RV and ensure they are securely fastened.
  • Avoid overloading circuits: Be mindful of the power requirements of your appliances and distribute their usage evenly across different circuits to prevent overloading.
  • Ensure proper maintenance of batteries and charging systems: Regularly inspect and maintain your RV’s batteries, ensuring they are fully charged and in good condition. Consider investing in a reliable battery monitoring system.
  • Replace faulty inverters or converters with reliable units: If you suspect an issue with your inverter or converter, consult a professional to diagnose and replace it if necessary.

Problem #2: Slide-Out Room Malfunctions

Slide-out rooms provide additional living space in Newmar RVs, but they can experience mechanical or operational issues. Problems may include uneven extension or retraction, motor failure, or misalignment.


  • Worn-out or damaged slide-out gears or rails: Over time, the gears and rails that facilitate the extension and retraction of slide-out rooms can become worn or damaged.
  • Insufficient lubrication: Inadequate lubrication of the slide-out mechanism can cause friction and result in difficulties during operation.
  • Motor or hydraulic system malfunctions: If the motor or hydraulic system responsible for powering the slide-out rooms fails or malfunctions, it can lead to operational problems.
  • Obstructions or debris hindering proper movement: Debris or objects obstructing the slide-out mechanism can prevent smooth extension or retraction.


  • Regularly inspect slide-out mechanisms for signs of wear or damage: Check the gears, rails, and other components of the slide-out system for any wear or damage. Replace any worn-out parts promptly.
  • Apply appropriate lubrication to slide-out gears and rails as recommended by the manufacturer: Use a high-quality lubricant specifically designed for slide-out mechanisms. Regularly lubricate the moving parts to ensure smooth operation.
  • Ensure proper maintenance and servicing of motors and hydraulic systems: Schedule regular maintenance for the motors and hydraulic systems that power the slide-out rooms. Follow the manufacturer’s guidelines for servicing and address any malfunctions promptly.
  • Keep the slide-out area clean and free from debris or obstructions: Regularly clean the area around the slide-out mechanism and ensure there are no obstructions or debris that could impede its movement.

Problem #3: Water System Leaks

Water leaks can lead to significant damage to the interior of your Newmar RV, causing mold growth, structural deterioration, and costly repairs. These leaks may occur in the plumbing system, faucets, water tanks, or connections.


  • Loose or damaged plumbing connections: Over time, the connections in your RV’s plumbing system can become loose or damaged, leading to water leaks.
  • Worn-out gaskets or seals: The gaskets and seals in faucets, toilets, and other water fixtures can deteriorate and result in leaks.
  • Cracked or damaged water tanks: Water tanks that develop cracks or other damages can cause leaks and potential water damage.
  • Freeze damage during cold weather: If the RV is exposed to freezing temperatures without proper winterization, the water lines can freeze and burst, leading to leaks.


  • Regularly inspect and tighten plumbing connections: Check all the plumbing connections in your RV and ensure they are securely fastened.
  • Replace worn-out gaskets or seals promptly: If you notice any signs of wear or deterioration in the gaskets or seals, replace them to prevent leaks.
  • Repair or replace cracked water tanks: If you discover any cracks or damages in your water tanks, consult a professional to repair or replace them as necessary.
  • Take precautions during freezing temperatures by properly insulating pipes and tanks: Before the onset of winter, properly winterize your RV by insulating exposed pipes and tanks. Use heating pads or blankets designed for RVs to prevent freezing.

Problem #4: HVAC System Issues

HVAC (Heating, Ventilation, and Air Conditioning) system problems can affect your comfort and enjoyment while traveling in your Newmar RV. These issues may include inadequate cooling or heating, strange noises, or airflow problems.


  • Dirty or clogged air filters: Over time, the air filters in your RV’s HVAC system can become dirty or clogged, reducing the efficiency of the system.
  • Malfunctioning thermostats or controls: Faulty thermostats or control units can lead to inaccurate temperature readings or improper functioning of the HVAC system.
  • Leaks or refrigerant issues in the system: Refrigerant leaks or low refrigerant levels can cause inadequate cooling or heating in your RV.
  • Damaged or faulty fan motors: Fan motors that are damaged or not working properly can result in poor airflow or unusual noises.


  • Regularly clean or replace air filters as recommended: Check the air filters in your HVAC system regularly and clean or replace them according to the manufacturer’s guidelines.
  • Verify proper functioning of thermostats and controls: Test the thermostats and controls to ensure they are accurately reading temperatures and controlling the HVAC system. Replace or repair any malfunctioning components.
  • Seek professional assistance to diagnose and repair refrigerant leaks or issues: If you suspect a refrigerant leak or have concerns about the refrigerant levels in your HVAC system, consult a professional technician to diagnose and repair the problem.
  • Replace damaged or faulty fan motors: If you notice unusual noises or poor airflow from the HVAC system, have the fan motors inspected and replaced if necessary.

Problem #5: Leveling System Malfunctions

Newmar RVs typically come equipped with leveling systems that ensure stability and comfort when parked on uneven terrain. However, these systems may encounter problems, resulting in difficulties in achieving proper leveling.


  • Hydraulic system leaks or low fluid levels: Hydraulic leveling systems rely on fluid pressure to operate. Leaks or low fluid levels can lead to malfunctions.
  • Damaged or malfunctioning leveling jacks: The leveling jacks themselves may become damaged or experience mechanical failures.
  • Electrical or control panel malfunctions: Electrical issues or control panel malfunctions can disrupt the operation of the leveling system.
  • Excessive weight or unbalanced loading: Overloading your RV or uneven weight distribution can strain the leveling system, causing difficulties in achieving level positioning.


  • Regularly check and maintain hydraulic fluid levels: Monitor the fluid levels in your hydraulic leveling system and promptly address any leaks. Keep the fluid reservoir adequately filled as per the manufacturer’s recommendations.
  • Inspect and service leveling jacks for damage or malfunctions: Periodically inspect the leveling jacks for any signs of damage or mechanical issues. Lubricate the jacks as recommended by the manufacturer and have them serviced or repaired if necessary.
  • Troubleshoot electrical or control panel issues or seek professional assistance: If you encounter electrical or control panel malfunctions related to the leveling system, consult your RV’s user manual for troubleshooting steps. If the problem persists, seek professional help.
  • Ensure proper weight distribution and balance within the RV: When loading your RV, distribute the weight evenly and avoid exceeding the recommended weight limits. Use leveling aids such as blocks or pads to help achieve proper weight distribution and balance.

Problem #6: Awning Malfunctions

Awnings provide shade and protection from the elements, enhancing outdoor comfort. However, awning malfunctions can occur, such as difficulty extending or retracting, tears in the fabric, or motor failures.


  • Misaligned or damaged awning rails: Over time, the awning rails can become misaligned or damaged due to regular use, strong winds, or accidental impacts.
  • Excessive dirt or debris on the awning: Accumulation of dirt, leaves, or debris on the awning can impede smooth operation and cause issues.
  • Worn-out or damaged fabric: The awning fabric may wear out, develop tears, or become damaged due to prolonged exposure to the sun, harsh weather, or accidental snags.
  • Motor or control system malfunctions: Motors or control systems responsible for extending or retracting the awning can experience malfunctions, leading to operational problems.


  • Inspect and realign awning rails as needed: Regularly check the awning rails for any misalignment or damage. If misalignment is detected, follow the manufacturer’s instructions to realign them properly.
  • Regularly clean the awning to remove dirt and debris: Clean your awning periodically using a mild soap solution and a soft brush. Remove any dirt, leaves, or debris to ensure smooth operation.
  • Replace worn-out or damaged fabric with a suitable replacement: If your awning fabric is worn-out, torn, or damaged, consider replacing it with a new one. Follow the manufacturer’s guidelines for fabric replacement or consult a professional for assistance.
  • Seek professional assistance to repair or replace faulty motors or control systems: If you suspect a problem with the awning’s motor or control system, consult a professional technician with experience in RV awning repairs. They can diagnose the issue and perform the necessary repairs or replacements.

Problem #7: Body and Exterior Issues

Newmar RVs are designed to withstand the rigors of the road, but external problems can still arise. These issues may include delamination, paint peeling or fading, cracks, or damage to the fiberglass body.


  • Exposure to harsh weather conditions: Continuous exposure to sunlight, rain, snow, and other extreme weather elements can lead to deterioration of the RV’s exterior.
  • Improper maintenance or cleaning techniques: Using harsh chemicals or abrasive materials during cleaning or neglecting regular maintenance can cause damage to the exterior.
  • Accidental damage or collisions: Collisions or accidental impacts with objects can result in scratches, dents, or other damages to the RV’s body.
  • Quality control issues during manufacturing: In rare cases, manufacturing defects or quality control issues can contribute to exterior problems.


  • Protect your RV from harsh weather conditions by using appropriate covers or storage: When not in use, consider using RV covers or storing your Newmar RV in a sheltered area to protect it from prolonged exposure to sunlight, rain, or snow.
  • Follow proper maintenance and cleaning procedures recommended by the manufacturer: Use mild, RV-safe cleaning products and soft materials when cleaning the exterior of your RV. Regularly inspect the body for any signs of damage and address them promptly.
  • Seek professional repairs for major damage caused by accidents or collisions: If your RV sustains significant exterior damage due to accidents or collisions, consult a professional RV repair service for a thorough assessment and repair.
  • Address any manufacturing defects under warranty or consult a trusted RV repair specialist: If you suspect any manufacturing defects that have contributed to exterior issues, contact the manufacturer or an authorized RV repair specialist to address the problem, especially if your RV is still under warranty.

Wrapping Up

Being aware of the common problems that may arise in Newmar RVs empowers owners to proactively address and resolve them. Some of the most prevalent issues include electrical system malfunctions, slide-out room issues, water system leaks, HVAC system problems, leveling system malfunctions, awning malfunctions, and body and exterior issues.

Fixing these issues promptly will ensure a smooth and enjoyable RVing experience in your Newmar motorhome. Remember, regular maintenance, proactive inspections, and prompt repairs are crucial for maintaining the longevity, performance, and value of your investment.

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