Owning an RV can be a true pleasure, and one equipped with an air conditioner is important for your comfort. Unfortunately, it is not uncommon for your RV’s air conditioner to fail over and over.
Just like any other machine, an RV air conditioner can have issues and requires regular maintenance. From diagnosing the issue to finding a solution, here’s what you should know when your RV air conditioner turns on and off repeatedly.
What Does Short Cycling Mean?
Just as with any other air conditioner, the one in your RV should kick on when the thermostat temperature does not meet the actual air temperature. Your thermostat should tell your air conditioner to turn on until it adequately cools.
When your air conditioner stops running before meeting that temperature, it is called short cycling. Short cycling occurs when something in the air conditioning system prevents this full cooling cycle from happening. There may be several culprits causing this issue.
Obviously, short cycling is a problem that will need your attention. Travelling in an RV without air conditioning can be quite uncomfortable.
Common Causes of Short Cycling
A handful of common issues may be causing your RV air conditioner to shut on and off repeatedly.
Cleaning AC Filters and Evaporator Coils
Cleaning AC filters is different from cleaning your evaporator coils, below is the process for cleaning each.
While cleaning your RV’s air conditioning filter doesn’t require a lot of strength, it does require time and patience. The following steps will ensure a clean, well-functioning filter:
- Power down any connections and shut off the air conditioner
- Decide whether you want to clean it yourself or hire a technician
- Open the cover and remove the filter
- Note the manufacturer make and model
- Do not reactivate the AC without the filter
- Scrape clear dust and other particles with a microfiber cloth for light clean or coarse brush for grease and grime
- Use a vacuum to clean fine particles, be careful with the pressure
- Submerge in warm, soapy water for no longer than 30 minutes
- Remove and rinse
- Treat with half parts vinegar, half parts water to prevent microbial growth
- Dry with a towel, set in a warm place (preferably the sun)
- Replace cleaned, dried filter into the unit
To clean the evaporator coil, make sure to shut off all power and disconnect the battery. The air conditioner unit will have 2 coils, the condenser and evaporator. The condenser is located in the back and can be seen without opening the unit. The evaporator coil is in the front of the unit and is covered. To clean this, follow the directions listed below:
- Go to the roof where the air conditioning unit is located safely
- Take off the shroud
- Take off the coil sheet metal by removing screws
- If the coil is wet, let it dry
- When dry, clean with a vacuum
- Put the unit back together
Tips for Maintaining Your Unit
RV air conditioners are no different than any other machine, and that means continued maintenance. The 4 areas to focus on include:
- Plastic Cover- this protects the air conditioner from the elements, so be sure there are no cracks or splits
- Fan- maintain and service the fan, as it keeps the air moving and should be well-oiled
- AC Condenser- check twice a year for dirt and leaves to prevent blockage
- Roof Vents- when you can, open the vents to allow moisture to evaporate
Is It Better to Clean My Unit Myself?
First, you need the appropriate tools and know-how to clean your RV’s air conditioning unit correctly. If you are looking to save money, DIY will ensure that you don’t spend extra hiring a technician. Also, the internet is quite a useful resource, particularly with YouTube videos.
Having said that, if you are not comfortable with cleaning or maintaining certain parts of the AC unit, you may want to hire someone with the appropriate certification. That way, you can get back on the road with less stress.