Florida summers don't negotiate. From May through October, Indian River County averages 90 to 95 degrees with regular spikes above 95. Humidity sits at 74% to 80%. Your RV's air conditioning system runs 8 to 12 hours a day during those months, and it wasn't designed for that kind of workload in most cases. We service between 40 and 60 AC-related calls every summer across Sebastian, Vero Beach, and the surrounding area, and the majority of those failures were preventable with routine maintenance.
- Clean or replace AC filters every 2 weeks from May through October
- A soft-start kit ($275 to $425 installed) lets you run AC on a 30-amp pedestal without tripping breakers
- Set the thermostat to 75 to 78 degrees, not lower; RV AC cools 15 to 20 degrees below ambient
- Single AC works for RVs under 30 feet; dual AC is strongly recommended for 30+ feet in Florida
- Annual professional AC service ($95 to $175) catches capacitor and fan motor issues before they fail
- Full AC replacement runs $1,200 to $2,500 installed
This guide covers everything you need to keep your RV cool in Florida without burning out your AC system or your electric bill. It's based on 10 years of AC work across Indian River County and a lot of sweat-soaked diagnostic sessions on RV rooftops.
1. Understanding Florida's Heat Load
Before you can fix your AC strategy, you need to understand what you're fighting against. Florida's heat load on an RV is a combination of 4 factors:
- Air temperature. Sebastian averages 91 degrees in July and August, with 15 to 20 days above 95. Your AC needs to overcome a 15 to 20 degree temperature differential, minimum.
- Humidity. At 74% to 80% humidity, your AC is doing double duty: cooling the air and removing moisture. This takes significantly more energy than dry-heat cooling. That's why a 15,000 BTU unit that handles Arizona just fine can struggle in Florida.
- Solar gain. The UV index in Indian River County hits 9 to 11 in summer. Your RV's roof absorbs that energy and radiates it inside. A white roof (TPO) reflects more than a dark roof (EPDM), but either way, the roof surface temperature can reach 150 to 160 degrees.
- Insulation quality. Most RVs are insulated to R-5 to R-7 in the walls and R-7 to R-11 in the ceiling. For comparison, a typical Florida house has R-13 walls and R-30 in the attic. Your RV loses cool air faster than a house, period.
2. Single AC vs. Dual AC
This is the most common conversation we have with RV owners headed into their first Florida summer. Here's the breakdown:
Single AC (13,500 or 15,000 BTU)
- Works well for RVs under 28 to 30 feet with decent insulation
- Can maintain 75 to 78 degrees inside when outside temps stay below 92 to 95 degrees
- Struggles on days above 95, especially in the afternoon when solar gain peaks
- Runs almost continuously from 10 AM to 7 PM in summer, which shortens compressor life
Dual AC (two units, front and rear)
- Recommended for RVs over 30 feet or any RV that will be occupied full-time in Florida
- Can maintain 72 to 75 degrees even on 98-degree days
- Each unit cycles on and off rather than running continuously, which extends compressor life
- Requires 50-amp service or a soft-start kit on each unit to run on 30-amp
- Adding a second unit costs $1,500 to $2,800 installed (if the roof structure supports it)
If you're in a travel trailer under 28 feet and you only use it on weekends, a single 15,000 BTU unit with a clean filter and decent shade will get you through. If you're full-timing in a 35-foot fifth wheel at Treasure Coast RV Park, you'll want two units. That's not a sales pitch; it's just the math on BTUs vs. cubic footage in Florida heat.
3. Soft-Start Kits
A soft-start kit is the single best upgrade you can make to your RV AC system for Florida camping. Here's why it matters.
When a standard RV AC compressor starts up, it pulls 40 to 50 amps for the first half-second. On a 30-amp pedestal, that momentary spike trips the breaker. With a soft-start kit installed, that startup draw drops to 15 to 20 amps. The compressor ramps up gradually instead of slamming on at full power.
Benefits in Florida
- Run AC on 30-amp service. Without a soft-start, running your AC on a 30-amp connection is a gamble. With one, it's reliable.
- Run two AC units on 50-amp. Each unit with a soft-start can run without tripping the 50-amp main breaker, even when both kick on at the same time.
- Generator compatibility. If you're boondocking with a 3,500-watt portable generator, a soft-start lets you run one 15,000 BTU unit. Without it, the generator stalls on startup.
- Longer compressor life. Lower startup stress means less wear on the compressor windings over time.
We install Micro-Air EasyStart and SoftStartRV units. Both work well. Installation takes about 45 minutes and costs $275 to $425 including the part. If you're planning a Florida summer, get this done before the heat hits in May.
4. Maintenance Schedule for Florida
RV AC maintenance isn't complicated, but the schedule in Florida is more aggressive than what your owner's manual probably recommends. Here's what we suggest:
Every 2 weeks (May through October)
- Clean or replace the air filter. A clogged filter is the number one cause of preventable AC failures. Pull it out, rinse it with water, let it dry, and put it back. If it's torn or won't come clean, replace it ($8 to $15).
- Check the condensate drain. Florida's humidity means your AC pulls a lot of moisture out of the air. That water needs to drain. If the drain is clogged, water backs up inside the unit and can leak into your RV's ceiling.
Monthly (May through October)
- Inspect the exterior shroud on the rooftop unit. Look for cracks or UV damage. A cracked shroud lets rain into the unit's electrical components.
- Check that the ceiling assembly gasket is sealed. If you feel warm air around the AC vent, the gasket between the rooftop unit and the ceiling assembly may be compressed or deteriorated.
Annually (before May)
- Professional inspection of the compressor, capacitors, fan motor, and coils ($95 to $175)
- Coil cleaning with a commercial coil cleaner and low-pressure rinse
- Capacitor testing (capacitors lose capacity over time; a weak capacitor causes the compressor to overheat and fail)
- Fan motor amp draw test (high amp draw indicates bearing wear)
- Thermostat calibration check
5. Thermostat Settings and Energy Tips
Setting your thermostat correctly saves energy, reduces compressor wear, and actually keeps you more comfortable. Here's what we've learned from 10 years of Florida RV service:
- Set it to 75 to 78 degrees. RV AC units are rated to cool 15 to 20 degrees below ambient. If it's 95 outside, the unit can realistically hold 75 to 80 inside. Setting it to 68 means the compressor runs continuously and never hits the set point, which causes premature failure.
- Use the fan on "auto," not "on." When the fan runs continuously, it recirculates humid air through the coils even when the compressor is off. This reduces dehumidification and makes the RV feel muggy.
- Close blinds on the sun side. This is simple but effective. Reflective windshield covers and window shades reduce solar gain by 30% to 40%. Your AC works less when the sun isn't cooking the interior directly.
- Park in shade when possible. A shaded RV runs 10 to 15 degrees cooler on the interior surface than one in direct sun. That's a huge difference for your AC's workload.
- Run the AC before peak heat. Start your AC by 9 or 10 AM, before the interior heats up. It's easier for the unit to maintain a cool temperature than to pull it back down from 90+ degrees.
- Consider a dehumidifier. A small portable dehumidifier ($40 to $80) running alongside your AC can reduce moisture load and make 78 degrees feel more comfortable. Less moisture means the AC spends more of its capacity on cooling and less on dehumidification.
6. When Your AC Needs Professional Help
Some AC issues you can handle yourself (filter cleaning, drain clearing, shroud inspection). Others need a tech with diagnostic tools. Call us if you notice any of these:
- The unit runs but doesn't cool. This usually means a failed capacitor, low refrigerant, or a bad compressor. Capacitor replacement is $95 to $175; compressor or refrigerant issues are $300 to $900+.
- The breaker trips on startup. Could be a failed capacitor, a locked rotor, or an overloaded circuit. A soft-start kit solves the circuit issue; the other two need diagnosis.
- Grinding or rattling from the rooftop unit. Usually a failing fan motor or loose mounting hardware. Fan motor replacement runs $175 to $400.
- Ice on the evaporator coils. This indicates low airflow (dirty filter, blocked return) or low refrigerant. Turn the unit off and let it thaw before calling. Running it frozen damages the compressor.
- Water dripping inside the RV from the ceiling around the AC. This is either a clogged condensate drain or a failed ceiling gasket. If ignored, it'll cause water damage to the ceiling and walls.
- A burning smell. Shut the unit off immediately. This could be a failing fan motor, a burnt wire connection, or a compressor overheating. Don't run it again until it's been inspected.
We carry the most common AC parts on the truck: capacitors, fan motors, thermostats, gaskets, and soft-start kits. For full unit replacements, we can usually have the new unit within 1 to 3 business days. Call 772-238-8487 to schedule AC service before the summer rush.