RV Air Conditioner Not Blowing Cold: Here’s How To Fix It ?

RV Air Conditioner Not Blowing Cold: Here’s How To Fix It

(Last Updated On: December 2, 2021)

Many motorhomes, fifth-wheel campers, and more extensive travel trailers come with one type of roof-mounted air cooling system.

If something is off with the device or stops blowing the cold breeze, it could change your exciting vacation into a hot, sweaty nightmare.

Is your RV’s air conditioner stopped running cold air? If yes, you can do several ways to identify the issue. If you have some of these issues, it is possible to solve the problem yourself.

In this article, we’ll discuss how an RV air conditioner operates and how to look over the various components of your AC to find out what’s causing it not to be able to keep your cool.

Why is My RV’s AC Operating, But It’s it’s Not Cooling?

Here are the five most typical reasons your RV’s AC isn’t providing you with adequate cool air.

  • The thermostat is not working correctly.
  • Issues with the fan
  • Low Freon levels
  • A dirty compressor
  • A capacitor that has burned out

What is an RV Air Conditioner Function?

Understanding how an air conditioner functions can help you identify the issue faster. A large number of RV air conditioners can be integrated with heating systems.

A compressor is the most common component that circulates the Freon cooling fluid around the coils and fins of the condenser.

A specially designed fan is used to blow cool air into the RV’s internal ventilation system.

The thermostat’s switch controls the compressor and the fan, which is powered by an internal 12-volt electrical system. Volt electric system.

The unit shuts off the team if the temperature you want to reach is reached by its thermostat.

What Should I Do if My RV’s Air Conditioner isn’t blowing cold air?

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If your RV AC unit isn’t producing cold air? The best point to look at is with the thermostat and the electric system that powers it.

Sometimes something as small as a loose wire or a low battery can cause the thermostat to shut off the system.

Other indicators to help identify the cause:

If the RV’s AC doesn’t make any noise, It could be because the controls aren’t receiving enough power.

You may need replacement of the capacitors if the compressor or fan starts slow or do not blow air and only blow air lightly and blows hot air and then ceases, and the lights dim when another air conditioner that trips the circuit breaker.

Is There A Problem with Thermostat?

Sometimes, it’s due to the thermostat burning out or a temperature sensor that’s failing.

If your thermostat does not display its temperature in a blink or the amount it shows isn’t accurate, you may require a replacement thermostat.

If your thermostat is powered by AAA batteries, not 12 Volt power, it could be because the batteries are running low.

How do I replace Thermostats in RVs that are burned out?

Thermostats and their temperature sensors are typically used for an extended time. But they have a finite time-to-life.

If a thermostat component gets burned out, it may fail to accurately measure the temperature or send a signal to the compressor.

In this situation, the compressor shuts down, yet the fan operates as if it is required to move this air.

I’ve experienced more than one instance that a thermostat would not work, and I wasted many hours looking at the things that didn’t turn out to be the cause.

Fortunately, thermostats are relatively simple to change.

  • Switch off the power by switching off the breaker or by removing the thermostat’s internal batteries.
  • Take care to remove the thermostat off the wall. The wires will remain.
  • Remove the cables from the back of the thermostat.
  • Take the new thermostat right out of its packaging, and connect it to the cables that come from the wall. After that, you can reset it in the correct position.
  • Follow the activation and programming directions included with the new thermostat. Follow the activation and programming instructions that came with it.

Is There An Issue With Your Fan?

If you find that the AC fan is only working at certain speeds or is unable to go higher than the lowest setting without dimming lights, If this is the case, then the motor or Capacitor could be failing.

If you detect a burning smell as the fan runs, it could be because the bearing or wire inside the motor has gone out. If you find yourself in this situation similar, running is a hazardous risk of fire!

In any of these situations, the quickest and most straightforward solution is to change the fan.

What if it’s a Compressor Issue?

Sometimes, a compressor will be damaged or even overheat if it’s being over-taxed. In certain situations, it’s possible that a simple check-up could be enough to make sure the system functions properly.

If the air conditioner doesn’t blow cold air or is quickly overheating, the fins and coils might need to be cleaned and sanded. While you’re there, be sure to inspect the roof areas on your AC system for loose bolts or gaskets.

If you see an accumulation of frost or ice, it could be that you need freon, and the system needs to be recharged. Many automotive stores have containers of freon, which can be used to restore an RV’s or car’s AC system.

If you’re considering this route, ensure you pay the extra to purchase a high-quality product. This isn’t the kind of item you should skimp on!

If your air conditioner is loud, there could be something wrong or something else interrupting the motors.

If you’ve got equipment on the table, you can easily remove the shroud and take a closer inspection. If you spot something burned out or smells hot, it could be dealing with a damaged motor.

If you have a minor issue with your compressor that isn’t a major one, such as a low Freon level and dirty cooling fins, you could be able to solve it by yourself.

If your compressor has burned out or an internal leak that is significant, there is a good chance that you’ll require an expert to repair the entire unit.

What is it? Is It Capacitor?

Capacitors play an essential part during the running of the RV AC. They are a source of electricity that gives the fan motor and compressor an additional boost every time the air conditioner in your RV starts. They typically look like a small battery flask or button.

The Capacitor may wear out with time, mainly if the RV has been in storage for more than one winter.

A compressor capacitor or fan failing to begin can trigger various indicators to watch for.

It includes

  • The unit’s air conditioner is humming as it tries to get it to turn on.
  • The air conditioner runs for a short time and then trips a breaker or blows an electrical fuse.
  • The fan is not turning on without pushing.
  • The fan can only be blowing hot air because of the compressor’s inability to start.
  • Sometimes, a bad capacitor might produce a tiny fume.

Several capacitors may have failed simultaneously. If you spot a defective one inside the fan, don’t believe this is the only issue.

It could be that there is a damaged capacitor inside the compressor.

If you don’t check each device and only swap one component, you might be left with the same issue with your hands even when you replace one. Therefore, it is essential to do your research.

How Can I Examine a Bad capacitor in my AC?

If you spot an insecure capacitor, You can then test it with a typical multi-meter.

A reliable capacitor will show an amount on the multi-meter display, which gradually diminishes over one minute.

Fortunately, a defective capacitor is quite simple to replace. Be sure to record the voltage required and model numbers on the Capacitor you replaced.

If you’re lucky enough, luck, you may be able to find an equivalent in the electrical department at a hardware store.

In other cases, you might need to purchase one on the internet. Some websites offer express or overnight shipping.

How to Replace A Out or burned Out Capacitor

It is essential to be aware that capacitors hold a small charge regardless of when the primary power source is shut off.

It is not recommended to use your bare hands. In the replacement process, you’ll first have to eliminate the charge that has accumulated.

  • Step 1:Make sure all the power is turned off to the device. If you’re not sure, I’d suggest shutting off all power in the circuit breaker.
  • Step 2:Follow the wires and take note of which wires go where. A simple tab of masking tape with a few letters on it can help you keep track.
  • Step 3:You need to drain the remaining charge of the Capacitor that was previously used. It is done by wearing insulated gloves and connecting the two terminals using a screwdriver or another conductory piece of metal.
  • Fourth Step: Then, you can take the Capacitor off and place it in the place. In some configurations, it might be necessary to use an iron to solder.
  • 5 Steps: Turn your power off. Please give it a while and attempt to turn the air conditioner of the RV back on.

When should I seek Professional Services?

Simple tasks like replacing a damaged thermostat or installing a new one are typically things you can make yourself.

Repairing or replacing one of your burned-out capacitors and charging the compressor’s freon is also possible when you’re skilled and have the right tools.

When it comes to repairing the motor of a fan, typically, it is best to replace the whole fan.

If not, I’d suggest sending it to an expert repair shop that is specialized in RVs. In a crisis, it is possible to search the local yellow pages to find an HVAC repair business.

The service technicians are typically educated and are equipped to fix almost every air conditioning unit.

How do I winterize My Air Conditioner in my RV?

The winterization of your vehicle is essential to its maintenance and prolonging its longevity. This includes winterizing your air conditioning system.

  • Clean any pollen, dust, dead bugs, dust, or dirt off the vehicle’s exterior and make use of canned air to remove dust from the interior components. If you can’t get to an RV’s roof with your hand, you can spray it using the spray hose.
  • Shut off the power to the thermostat and air conditioner to ensure that it does not accidentally turn on during the summer months of spring or autumn.
  • If you’re unable to keep your RV inside during the winter months, it is recommended to protect the components outside with a roof. There are companies such as Frost King who offer unique air cover for air conditioners. But, I’d recommend attaching it with zip ties or tie-downs. If you’re concerned about the possibility of solid winter winds, You can always make your own using a stone or brick.

As winter approaches, be sure to inspect the roof of your RV. It’s not uncommon for a squirrel in desperate need to find the best place to escape the winter cold through an AC cover. Also, be aware of the build-up of ice.

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