10 Hot Weather RV Preventive Maintenance Checks

Hot temperatures can take a toll on your RV, inside and out. In this article I would like to offer 10 hot weather RV preventive maintenance checks to help make sure you and your RV are ready to deal with the summer heat. Let’s start outside the RV.

Outside the RV:

It doesn’t matter if it’s a motorized RV or a truck towing a trailer, the vehicle needs to be ready for the heat. Hot summer temperatures affect the vehicle’s tires, cooling system and the transmission. If the vehicle isn’t prepared for hot temperatures there is a possibility you won’t reach your camping destination.

Checking fluid levels in RV

1) Checking Fluid Levels

For starters it’s a good idea to check all the fluid levels in the vehicle and make sure all service intervals are followed. This includes generators too. Engine oil lubricates moving parts and helps components run cooler. When the temperature increases, the engine, transmission and axles are subjected to more heat than normal. Used oil and transmission fluid loses its lubricating qualities and the ability to help keep moving parts cool. Replacing fluids and filters can help prevent heat related problems with your vehicles drive-line components.

check tire inflation on RV

2) RV & Tow Vehicle Tires

Tires are directly affected by hot temperatures, especially underinflated tires. An underinflated tire creates a tremendous amount of heat and when you factor in hot summer temperatures the results can be disastrous. Inflate the tire pressure based on the load, and if a tire is overloaded try to redistribute some weight to correct the problem. Always check and adjust tire pressure when the tires are cold, and/or before traveling more than one mile.

engine antifreeze reservoir on tow vehicle

3) Vehicle Cooling System

Hot temperatures affect a hot running engine. The vehicle’s cooling system is designed to prevent the heat producing engine from overheating and quite possibly seizing up. If you don’t maintain the vehicle’s cooling system rust, scale and corrosion build-up in the radiator, water pump and engine coolant passages can result in an overheated engine. Flushing the cooling system and replacing antifreeze at scheduled intervals can save your engine.  Don’t forget to inspect the radiator and heater hoses too. Soft and/or brittle hoses can indicate potential problems.

distilled water & battery filler

4) Vehicle & RV Batteries

When temperatures increase lead-acid battery life decreases. Heat is a battery’s enemy. Hot temperatures contribute to battery corrosion, and to water evaporating from the electrolyte. Keep the battery connections clean and during hot weather or periods of high usage check the battery frequently. Checking the water levels and adding distilled water as required can save your engine starting battery and your deep-cycle RV batteries.

Caution: When working on batteries remove any jewelry, wear protective glasses and gloves, and avoid getting battery acid on your skin or clothing. If you are not comfortable working on or around batteries have the work done by a qualified repair facility.

Now that the vehicle is ready for the hot summer temperatures we can concentrate on staying cool when we arrive at our destination. Here are some more helpful hot weather camping tips.

Inside the RV:

RV in the shade

6) Take Advantage of Shade

Strategically park your RV to take advantage of any shade that is available, especially on the side where the refrigerator vent is located. Don’t be afraid to ask for a shady site when you check-in at the campground. This will not only help keep the RV cool, but your refrigerator and roof air conditioner will work more efficiently too.

7) Air Conditioner

You can improve your air conditioners efficiency by keeping the A/C filters clean. In most cases you can wash the filters in warm soapy water, rinse thoroughly and allow them to dry before reinstalling. Another option is to clean the filters using a small hand held vacuum cleaner. I recommend you keep a new set of filters on hand in the event the old ones have seen better days.

day/night shades closed in RV

8) RV Awnings

Use your main patio awning and any window awnings to assist in keeping the RV cool. In addition to using the awnings use your window blinds, or day/night shades to help keep the sun out and the cooler air inside. Proper ventilation helps prevent excess heat in your RV too. You can install vent covers, like Maxx Air vent covers, over the roof vents to allow for ventilation and air circulation. They are inexpensive, easy to install and they let the fresh air in, even when it’s raining.

RV surge protector

9) RV Electrical Surge Protection

Campground voltage can fluctuate, especially during the hot summer months when all the campers are running their air conditioners. You should use a surge protector designed to protect your RV from improper wiring, and in the event that voltage drops below 105-volts or spikes above 130-volts.

Surge Guard protection
RV refrigerator

10) Refrigerator Efficiency

RV refrigerators are affected by outside temperatures too. To help the refrigerator work more effectively in hot weather try parking the RV with the side the refrigerator is on in the shade. Leave room between the foods for air to circulate. Avoid leaving the refrigerator or freezer door open for extended periods of time and use an inexpensive battery operated refrigerator fan to help circulate air.

Well there you have it, 10 quick and easy steps you can take to help prepare your RV for hot summer camping trips inside and out.


Happy RV Learning

Mark J. Polk

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Our goal at RV Education 101 is simple, we want to be your one stop vetted RV education source. No matter what type RV you own, if you are renting an RV, or what RV topic you want to learn about, RV Education 101 has you covered.

It is important you are careful where you get your RV education from. The other day, an online towing course was brought to my attention so I took a closer look. The first thing I noticed in the advertisement is, the online towing course has vetted information. According to the Merriam-Webster dictionary vetted means: having been subjected to evaluation or appraisal: critically reviewed and evaluated for official approval or acceptance. This tells me when I view the videos all the information is accurate, quality, professional content the viewer can depend on.

I want to give you an example of vetting information. When I was in the military, stationed in the 82nd Airborne Division, myself and some other maintenance warrant officers were tasked with vetting a new automated maintenance program called Unit Level Logistics System or ULLS. For weeks we collectively scoured the entire program to ensure everything was correct and accurate, so it could be implemented throughout the division maintenance units. After the program was vetted, we spent several more weeks teaching the new maintenance system to unit motor pool personnel. That is how you vet information and content.

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I have been used as an expert witness in several cases involving trailer towing incidents. I do not advertise this service, but if I review a case and see there is gross negligence on the part of somebody, I provide my assistance. In some of these cases people died as a result of misinformation or lack of proper equipment while towing a trailer. I take this training very seriously.

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Our RV Online Training courses are vetted by me. My military training, years of training and working in the RV industry, and over 25 years of hands on RV experience provides our students with accurate, quality, professional content they can depend on. If there is an RV topic you want to learn more about, I encourage you to visit RV Online Training and review the selection of video and e-book training courses we offer. We offer complete and comprehensive RV online training, and it’s affordable for everybody.


2 thoughts on “10 Hot Weather RV Preventive Maintenance Checks

  1. Thank you Mark. Semper fi

    On Tue, Jul 6, 2021, 11:40 AM RV 101 with Mark Polk wrote:

    > Mark Polk posted: ” Hot temperatures can take a toll on your RV, inside > and out. In this article I would like to offer 10 hot weather RV preventive > maintenance checks to help make sure you and your RV are ready to deal with > the summer heat. Let’s start outside the RV. Ou” >


  2. One thing you can do when you are traveling and camping in Hot Temperatures is to Carry an Electric FAN or Two along with you.

    Our Bedroom A/C works very efficiently, so much so you can hang meat in there. And we take advantage of this Cold Air using a Small Room Fan (Walmart $20) to move that Cold Air to the back of the RV and helping the other A/C work less. Our Rig really needs 3 A/C’s but we only have 2.

    It is also a good idea to save on wear and tear with your A/C’s and turn them off occasionally, basically give them a Rest.

    We have a 5th Wheel and most 5th wheels have a Closet in the NOSE CAP. Depending on how you are parked, the Nose Cap is a HUGE HEAT ABSORBER! If the closet has Doors on it, keep the doors closed to keep the outside heat from radiating into your RV! Again, help the A/C’s work more efficiently!

    Just some thoughts.


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