MRCOOL® TravelCool™ Winter Storage Guide: Protect Your RV Air Conditioner During the Off-Season
When camping season winds down, your RV may sit unused for weeks or months. That makes fall and winter preparation an important part of protecting your MRCOOL® TravelCool™ RV Inverter Heat Pump.
MRCOOL Travelcool Install Manual
A little preparation before storage can help prevent debris buildup, trapped moisture, damaged wiring, airflow restrictions, and unpleasant surprises when you pull the RV back out in the spring.
The TravelCool uses R-32 refrigerant, and MRCOOL specifically requires storage and servicing practices that account for the refrigerant system and adequate ventilation.
This guide covers what RV owners can safely inspect and clean before storage, what conditions to avoid, and what to check before using the system again.
1. Clean the TravelCool Filter Before Storage
One of the simplest things you can do before parking your RV is clean the indoor filter.
MRCOOL’s maintenance instructions state that the filter screen can be removed, cleaned with water, allowed to dry, and then reinstalled.
Before storage:
- Turn the TravelCool off.
- Remove the filter.
- Rinse the filter with clean water.
- Allow it to dry completely.
- Reinstall the dry filter.
Do not reinstall a wet filter before storage. Allowing the filter to dry completely helps reduce moisture buildup inside the air distribution area.
2. Remove Leaves, Dirt & Rooftop Debris
The rooftop unit is exposed to:
- Leaves
- Pine needles
- Dust
- Insects
- Road debris
- Tree sap
- Snow and ice exposure
MRCOOL states that ventilation openings should remain clear of obstruction.
Before storing your RV, visually inspect the rooftop TravelCool and remove loose debris from around the air inlet and outlet areas.
Avoid inserting tools or objects into the equipment.
3. Inspect the Rooftop Housing
Take a few minutes to inspect the exterior TravelCool housing.
Look for:
- Cracks
- Loose panels
- Missing hardware
- Damage from branches
- Signs of impact
- Damaged vents
MRCOOL states the rooftop unit should only be operated when the housing and wiring are intact and undamaged.
If you notice physical damage, have it inspected before operating the system again.
4. Inspect the Roof Mounting Area
Winter moisture can expose problems around rooftop equipment very quickly.
Inspect the area around the TravelCool mounting location for:
- Loose sealant
- Cracks
- Water staining
- Roof damage
- Soft roofing material
- Signs of previous leakage
The TravelCool is designed to mount through a 14.17” × 14.17” roof opening, so protecting the mounting area from water intrusion is important for the RV itself as well as the HVAC installation.
MRCOOL Travelcool Install Manual
5. Do Not Block the Unit’s Ventilation Openings
It may be tempting to wrap a rooftop AC tightly for winter.
Be careful.
MRCOOL repeatedly emphasizes that ventilation openings must remain clear and that the unit must be stored in a properly ventilated environment when applicable.
If you use an RV rooftop AC cover, make sure it is:
- Designed for rooftop HVAC equipment
- Properly fitted
- Not compressing or damaging the housing
- Not trapping excessive moisture
- Removed before operating the unit
Never operate the TravelCool while it is covered.
6. Remember: The TravelCool Uses R-32 Refrigerant
The TravelCool contains 25.39 oz of R-32 refrigerant.
R-32 requires specific safety precautions because it is classified as a mildly flammable refrigerant.
MRCOOL states that the unit should not be stored around continuously operating ignition sources such as:
- Open flames
- Operating gas appliances
- Electric heaters in use
The storage area should also be adequately ventilated and the unit protected from mechanical damage.
For most owners with the TravelCool permanently mounted on an RV roof, this primarily means do not attempt to open, modify, pierce, or service the refrigerant circuit during storage preparation.
7. Do Not Attempt Refrigerant Repairs Yourself
Winter storage preparation does not require opening the refrigerant system.
If you suspect:
- Refrigerant leakage
- Damaged refrigeration components
- Compressor problems
- Coil damage
stop and contact a qualified service professional.
MRCOOL states that anyone servicing or maintaining the refrigerant circuit should be properly qualified to handle flammable refrigerants.
MRCOOL Travelcool Install Manual
8. Check Wiring Before Long-Term Storage
You do not need to disassemble the TravelCool, but visible wiring can be inspected for obvious damage.
Look for:
- Pinched cables
- Frayed insulation
- Rodent damage
- Loose visible connections
- Moisture intrusion
MRCOOL specifically notes that cabling should be protected from wear, corrosion, excessive pressure, vibration, sharp edges, and other damaging conditions.
Electrical repairs should be left to qualified professionals.
9. Know the TravelCool Heating Temperature Range
The TravelCool heat pump is designed for heating operation within an outdoor range of approximately:
41°F to 75°F
5°C to 24°C
The listed indoor heating range is:
41°F to 81°F
5°C to 27°C
If outdoor temperatures fall below the heating operating range, the TravelCool may enter cold-weather protection.
10. What Does C2 Mean in Cold Weather?
The C2 code is the TravelCool’s outdoor low-temperature heating safeguard.
It does not automatically mean the unit has failed.
When the outdoor temperature becomes too low for heating operation, the TravelCool may stop and then restart after the temperature returns to an acceptable range.
This is particularly important for winter campers who may attempt to use the TravelCool heat pump during freezing or near-freezing conditions.
MRCOOL Travelcool Install Manual
11. Should You Use the TravelCool as Your Only Winter Heat Source?
For conditions within its rated heating range, the TravelCool can provide heat-pump heating.
However, once outdoor temperatures fall below the listed operating range, you should not assume the rooftop heat pump will continue operating normally.
For cold-weather RV travel, always plan your heating strategy around the expected outdoor conditions and the RV’s other available heating equipment.
12. Protect the Unit From Mechanical Damage
MRCOOL states the unit should be stored where mechanical damage can be prevented.
For an RV, that means thinking about the environment around the roof:
- Avoid low tree branches.
- Remove heavy debris.
- Be cautious around snow-covered branches.
- Do not pile equipment against the rooftop unit.
- Avoid automatic car washes with the rooftop air conditioner installed.
13. Watch for Snow & Ice Accumulation
If your RV is stored outdoors in a snowy climate, periodically inspect the roof.
Heavy snow and ice can:
- Block ventilation
- Add roof load
- Conceal debris
- Cause freeze/thaw moisture issues
Do not strike, chip, or pry ice directly against the TravelCool housing or coil area.
When removing snow from the RV roof, use methods that will not damage rooftop equipment.
MRCOOL Travelcool Install Manual
14. Disconnect or Manage Power Safely
If your RV is being placed into long-term storage, follow your RV manufacturer’s recommendations for shore power, battery storage, and electrical shutdown.
Before servicing or performing any electrical work around the TravelCool, power should be safely isolated.
MRCOOL specifies that electrical connections and rooftop air conditioner servicing must be performed by qualified professionals.
15. Don’t Forget the Remote Control
The TravelCool remote is easy to overlook when putting the RV away.
Before long-term storage:
- Remove weak batteries.
- Store the remote somewhere dry.
- Keep it away from extreme moisture.
- Make sure you know where it is before spring startup.
This prevents leaking batteries from damaging the remote during months of inactivity.
MRCOOL TravelCool Winter Storage Checklist
Before putting your RV away:
✅ Clean and fully dry the filter
✅ Remove rooftop leaves and debris
✅ Inspect rooftop airflow openings
✅ Inspect the housing for damage
✅ Check the roof mounting area
✅ Inspect visible wiring
✅ Remove weak remote batteries
✅ Protect the rooftop unit from impact
✅ Avoid blocking ventilation
✅ Do not open the refrigerant circuit
✅ Make sure any storage environment is appropriate for equipment containing R-32
✅ Record any existing error codes before shutdown
Spring Startup Checklist
When camping season returns, do not simply turn the unit on and assume everything is fine.
Start with a quick inspection.
Before startup:
- Remove any protective cover.
- Check the rooftop unit for damage.
- Remove leaves, nests, or debris.
- Inspect the roof mounting area.
- Verify the filter is clean.
- Reinstall fresh remote batteries if needed.
- Restore power.
- Test Fan Mode.
- Test Cooling Mode when outdoor conditions are appropriate.
- Test Heating Mode within the rated operating range.
- Watch the display for error codes.
The TravelCool cooling outdoor operating range is listed as 63°F–109°F, while the heating range is 41°F–75°F.
MRCOOL Travelcool Install Manual
Signs You Should Get the TravelCool Checked Before Spring Use
Contact a qualified professional if you notice:
- Damaged wiring
- Cracked housing
- Repeated breaker trips
- Refrigerant-related damage
- Fan motor problems
- Recurring error codes
- Burning smells
- Severe vibration
- Evidence of water intrusion into electrical areas
Frequently Asked Questions about MRCOOL® TravelCool™ Winter Storage Guide: Protect Your RV Air Conditioner During the Off-Season
Do I need to remove the TravelCool from my RV for winter?
Not normally. The TravelCool is designed as a rooftop RV system. Winter preparation generally involves cleaning, inspection, debris removal, and protecting the installation rather than removing the unit.
Can I cover my MRCOOL TravelCool during winter storage?
A properly fitted rooftop HVAC cover may be used for storage if it does not damage the unit or trap excessive moisture. Always remove the cover before operating the air conditioner.
What temperature can the TravelCool heat down to?
MRCOOL lists the outdoor heating operating range as approximately 41°F to 75°F (5°C to 24°C).
What happens if it’s colder than 41°F?
The TravelCool may activate its C2 low-temperature heating safeguard and stop heating until outdoor temperature conditions return to an acceptable range.
Should I clean the filter before winter?
Yes. MRCOOL instructs owners to remove the filter, clean it with water, allow it to dry, and reinstall it.
Does the TravelCool use flammable refrigerant?
The TravelCool uses R-32 refrigerant, and MRCOOL provides specific safety requirements regarding servicing, storage, ignition sources, ventilation, and refrigerant work.
Can I service the refrigerant system myself before storage?
No. Refrigerant-system service should be performed by appropriately qualified professionals trained to work with flammable refrigerants.
Protect It Now — Enjoy It Next Camping Season
Preparing your MRCOOL® TravelCool™ for winter does not have to be complicated.
The goal is simple:
Clean it. Inspect it. Keep airflow areas clear. Protect it from damage. Leave electrical and refrigerant repairs to qualified professionals.
A little preventive care before storage can make spring startup much easier and help your rooftop system stay ready for your next trip.
MRCOOL Travelcool Install Manual
Why MRCOOL DIRECT?
At MRCOOL DIRECT, we’re building a complete TravelCool owner resource center—not just selling the equipment.
Our TravelCool guides now cover:
- Installation
- Roof opening requirements
- Electrical requirements
- Heating and cooling performance
- Remote controls
- Maintenance
- Error codes
- Troubleshooting
- Winter storage and cold-weather care
That gives customers useful information throughout the entire ownership cycle.
