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Common Thor Ace RV Problems

Common Thor Ace RV Problems

The Thor Ace is one of the most popular RVs in the market today. It’s a great choice for people looking for an RV that offers comfort and convenience without sacrificing quality or affordability. Unfortunately, like all vehicles, there are common problems associated with the Thor Ace RV that can cause damage to your vehicle and inconvenience while on your road trip. In this article, we’ll discuss some of the more common Thor Ace RV problems and provide some tips for avoiding them. By learning about these issues and taking proactive steps to prevent them, you’ll be able to enjoy your Thor Ace RV experience without any worries.

Seals Leaking

One of the most common Thor Ace RV problems is leaking seals. Over time, the gaskets and seals around your vehicle can wear down, resulting in leaks that allow water, dust, and other debris to enter your vehicle. If left unchecked, this can lead to rusting of your RV as well as mold growth inside it. To prevent this, it’s important to inspect your RV regularly and replace any worn seals or gaskets as soon as possible. You can also apply a coat of sealant to areas that are prone to wear and tear, such as door and window seals. [1]

Refrigerator Issues

One of the most common problems encountered with Thor Ace RVs is issues with their refrigerators. Some of the common problems include water leakage, poor cooling, and dirt accumulation.

If your refrigerator is leaking water, it could be due to a faulty door seal or gasket. To fix this issue, clean the door seals thoroughly and replace any worn out parts.

If your refrigerator isn’t cooling properly, it could be due to a faulty thermostat or an insufficient power supply. To fix this issue, check the thermostat setting, test the power supply and inspect for other mechanical component issues. If necessary, contact a certified professional for assistance. [2]

Refrigerator Issues

Air Conditioner is Not Working

If your Thor Ace RV’s air conditioner isn’t working, there are several possible causes. First, check the circuit breaker and make sure it hasn’t been tripped. Additionally, check the emergency shutoff switch to ensure it is in the “on” position. To start troubleshooting further, open up the compartment door and verify that the air conditioner is receiving power. If it is not, then you will need to troubleshoot further and could potentially have an electrical issue.

If there is power to the air conditioner, be sure that all of the vents are open and unobstructed. Additionally, check the batteries and make sure they are charged up so that your AC will have enough power to run. If it is still not working, then you may need to call a technician to come and repair the air conditioner. [2]

Stuck Leveling Jacks

If your leveling jacks seem to be stuck, there can be a few different causes. If the jacks were retracted while wet or if you’re parked on a soft surface like grass, soil, or gravel, it can cause the hydraulic fluid inside them to become trapped and create pressure that prevents them from moving. You’ll need to find a way to release this pressure before you can make any progress.

The easiest way to do this is to use a jack stand and place it under the jacks, then use a ratchet and socket wrench to slowly loosen the bolts holding them in place until the pressure has released. You may also need to adjust your Travel Trailer’s tires or remove the mud flaps to give yourself more room for maneuvering. [2]

Motor Fuse Blowing

One of the more common Thor Ace RV problems is motor fuse blowing. This problem is usually caused by an electrical overload, which can be triggered in a number of ways. It could be due to a faulty component, such as a bad alternator or battery, power draw from appliances that exceed the capacity of your motorhome’s electrical system, or a short circuit.

To determine the source of your blown fuse problem, start by visually inspecting all wiring and components in the area. Pay special attention to any connections near the battery terminals and alternator output terminal, as they are most likely to be affected by an electrical overload. If you don’t see any visible issues, then you’ll need to check the motorhome’s fuse panel. Make sure all fuses are in good condition and that they match the proper amperage rating for their circuits. [3]

Motor Fuse Blowing

Generator Fails to Operate

If your generator fails to operate, there are several possible causes. It could be due to low fuel, lack of maintenance or a mechanical issue with the engine.

Check the fuel gauge and fill up if it’s empty. If this doesn’t solve the problem, check the oil level using a dipstick – make sure that it is full and not leaking.

If the fuel and oil levels are fine, then it could be a mechanical issue with the engine. Check the spark plugs and battery connections, as well as any loose wires. It’s also possible that the generator itself needs to be serviced or replaced if it’s an older model.

Finally, it may be a simple case of user error. Make sure you read the manual and understand how to use your generator correctly before attempting to start it. [3]

Backup Camera Fault

A faulty backup camera is a common issue with Thor Ace RVs. The most likely cause is an improperly connected cable, dirt blocking the camera lens, or a malfunctioning camera itself. To rectify this issue, check your cables and connections to make sure they are properly connected and clean any dirt off the lens of your camera. If the issue persists, then it may be necessary to replace the camera itself. [1]

Awning Fails to Move

One of the most common problems with the Thor Ace RV is when the awning fails to move. The first step in troubleshooting this issue is to check that it’s properly connected and lubricated. Inspect the drive cable, ensure it’s attached securely at both ends, and lubricate any corroded parts if necessary. Check that you’ve attached the awning to the RV frame, as well. If all of these steps have been taken and the problem still persists, it’s possible that there is an issue with the motor or the control board. To avoid further damage, contact your local Thor Ace dealer for assistance. [1]

Power Steering Pump Leak

One common problem with the Thor Ace RV is a power steering pump leak. If you notice fluid leaking from your power steering pump, it is important to address this issue quickly. There are several causes for this problem including a clogged return hose, improper installation of the hoses or an old seal that needs to be replaced. To fix this issue, you will need to inspect the return hose for any clogs or obstructions and ensure that it has been properly installed.

You may also need to replace the old seal if it is worn out or damaged. Additionally, make sure all hoses are secure and tightened down using a wrench. If the problem persists after performing these steps, contact a certified mechanic to further diagnose the issue. With proper maintenance and timely repairs, you can ensure that your Thor Ace RV is running smoothly for years to come. [1]

Power Steering Pump Leak

Windows lock problems

Windows lock problems are one of the most common issues with Thor Ace motorhomes. In many cases, these problems can be simply fixed by checking for loose screws around the windows and repairing them if necessary. It is also important to check that all of the window seals are in good condition since any cracks or holes may be allowing moisture into your RV. If your windows are still not locking properly after these steps, you may need to contact a professional for further assistance. [1]

Poor shock absorbers

One common problem that Thor Ace RV owners face is poor shock absorbers. This can lead to a bumpy ride on the road, making it difficult to drive and uncomfortable for passengers. Fortunately, there are some easy steps you can take to improve your shock absorbers’ performance.

First, make sure your tires are properly inflated at their recommended pressure. If the tires are over- or underinflated, it can cause extra stress on the shock absorbers and reduce their effectiveness.

Second, check that your shocks haven’t become worn out or damaged. Signs of wear include leaking fluid or oil around the shock, excessive bouncing when driving, or a feeling of instability, like the RV is not properly connected to the ground. If your shocks are worn out, you should replace them immediately.

Third, check your suspension system for any potential issues. Make sure all of the components are correctly adjusted and that there aren’t any signs of wear or damage. If something seems off, have your suspension system checked and repaired by a professional.

Finally, you may want to consider upgrading your shocks to better absorb the bumps and vibrations of the road. Aftermarket suspension systems are available that can improve your shock absorbers performance, giving you a smoother ride with less stress on your RV. [1]

The awning is not coming out

An awning is one of the most important features of an RV, so if you’re having trouble with yours, it can be really frustrating. The most common cause of awning problems is that the tension has been released from the roller tube. To fix this, simply re-tension the roller tube according to the manufacturer’s instructions.

Another issue could be a worn-out or broken roller tube, which will need to be replaced. If the wind has damaged your awning fabric, you may also have to replace it.

Finally, there could be an issue with your RV’s electrical system. Check all fuses and circuit breakers in the RV, and if none of those are tripped or blown, you may have to take it to a professional for more extensive diagnosis. [2]

Molding Falling Off

One of the most common problems with Thor Ace RVs is that the molding around windows, door frames and other places can start to come loose or fall off. If this happens, it’s important not to wait too long before fixing it since water damage can occur if it isn’t taken care of in a timely manner. Generally, the molding can be easily replaced with a few simple tools and materials. Additionally, if the screws or nails that are used to secure the molding have loosened, they should be tightened in order to prevent it from falling off again. [3]

Molding Falling Off

Trailer Floor may Separate from Frame

One common Thor Ace RV problem is that the floor may start to separate from the frame. This can be caused by a variety of factors, including corrosion, poor-fitting parts, and damage.

If you find that your Thor Ace RV’s floors are separating from the frame, do not attempt to fix it yourself as this could make the problem worse. The best course of action is to take your RV to an experienced RV technician for repair.

Your technician can assess the extent of the damage and recommend a suitable solution, such as welding or replacing parts. They may also be able to fix any issues with corrosion or other underlying problems that could have caused the floor to separate from the frame. [2]

Breakaway Switch Wired Incorrectly

One of the common Thor Ace RV problems is a breakaway switch wired incorrectly. This can lead to your vehicle not stopping when you put your foot on the brake pedal, or even worse – it can cause damage to other parts of your rig. To ensure this doesn’t happen, make sure that the breakaway switch is correctly wired according to the manufacturer’s instructions. If you’re not sure about how to do this, it’s best to consult a qualified mechanic or RV specialist for advice. [2]

Cooktop Flame May Become Inverted

One common issue with the Thor Ace RV is that the cooktop flame may become inverted. This occurs when a portion of the flame is diverted back into the fuel line, resulting in a loud and sudden popping noise. Fortunately, this can be easily remedied by cleaning out any accumulated dirt or debris from the pilot light orifice. To do this, simply unscrew the orifice with a small screwdriver and use compressed air to clear out any residue. Additionally, inspecting the orifice for any obstructions is also important to prevent further problems from arising. [3]

Tire Valve Stem Extension May Become Damaged

One common Thor Ace RV problem is that the tire valve stem extension may become damaged. This can be caused by road vibrations, age or excessive weight on the wheel. In order to check if your tire valve stem extension is damaged, you should inspect it once every few months to make sure there are no signs of damage. If you do find signs of damage, you should replace the extension as soon as possible. This is a relatively simple task that can be completed in minutes. [3]


Are Thor motorhomes high quality?

Yes, Thor motorhomes are considered to be high quality vehicles. They come with a variety of features such as spacious interiors and modern amenities. Although the price tag may be higher than some other RV models, they offer many more options and comforts that make them worth it.

What does ACE mean on Thor RV?

ACE stands for Advanced Contemporary Engineering. It is Thor’s design and building process, which focuses on creating a more lightweight and efficient RV that still provides a great deal of comfort. The ACE system includes features such as superior insulation and aerodynamic body panels to ensure the most comfortable ride possible.

What does ACE mean on Thor RV?

What are the disadvantages of a Class A motorhome?

There are some drawbacks to owning a Class A motorhome. These vehicles can be more expensive than other RV types, and may require additional maintenance and repairs due to their size. They also tend to consume more fuel than smaller RVs, making them less cost-effective for long trips. Additionally, many models lack interior space when compared to Class B and Class C motorhomes.

What is the life expectancy of a Class A motorhome?

The life expectancy of a Class A motorhome depends on how it is maintained and cared for. Generally, these vehicles can last anywhere from 15 to 20 years or more with regular maintenance and repairs. However, certain factors such as exposure to extreme temperatures and intense driving conditions can shorten the lifespan of your RV.

Which class of RV is safest?

Class A motorhomes are generally considered the safest type of RV. These vehicles are large and offer superior visibility, so it is easier to see potential hazards on the road. Additionally, because they have more weight and stability than other classes, they tend to handle better in less-than-ideal driving conditions.

Useful Video: Thor Ace Motorhome Monitor Repair


Thor Ace RV owners have traditionally enjoyed the convenience of an RV, however they can be prone to a variety of problems. Common problems include roof leaks, faulty axles and suspension systems, water damage, and electrical issues. Fortunately, with proper maintenance and regular check-ups, many of these issues can be prevented or minimized. Owners should also consider purchasing extended warranties and researching the available aftermarket parts. By keeping up with regular maintenance and understanding the common problems, Thor Ace RV owners can enjoy their vehicles safely for years to come.

We hope this article has provided useful information about common Thor Ace RV problems that you may encounter as an owner.

Thank you for taking the time to read this article. Happy camping!


  1. https://www.camperupgrade.com/thor-ace-rv-problems/
  2. https://camperask.com/ace-motorhom-problems/
  3. https://trucksauthority.com/common-problems-with-thor-ace-rv/