Troubleshoot RV Air Conditioning and Electrical Issues

Hello Mark My Phrases readers! This month, we’ve acquired questions on RV air con and electrical points. Bear in mind to ship your RVing inquiries to [email protected].

I’ve a Winnebago motorhome with a Coleman ducted-roof AC. Now we have condensation leaking into the coach. My inspection reveals no freeze-up on the evaporator coil, and a temperature verify exhibits 20 levels distinction between the air going into the return and that within the retailers. The leak happens periodically however is constant. Condensate is operating off the roof as effectively. Need assistance.

Hello Hkrbr,
Most Coleman roof airs have two plastic drains for condensation water, situated on the edges of the air-conditioning unit baseplate. These will typically turn out to be restricted by a buildup of dust and goo, and that may trigger the condensate water to discover a new path, like into the coach’s inside. The remedy is a reasonably easy cleansing of the drains and the evaporator compartment. Shut the unit off and, to be further secure, both unplug from shore energy or flip off the breaker that serves the air conditioner.

Black air conditioning unit.

Picture: Coleman/Tenting World

On the roof, take away the plastic shroud. Take away the quilt over the evaporator core. Use a twig cleaner, like Implausible or 409, and clear the evaporator coils and the drip pan. Use a small brush or a bit of versatile wire to scrub out the little plastic drains which are discovered on both sides of the baseplate. Button it up, and you need to be good to go. I discovered an excellent webpage with photos and data that will help you do the job. Check out this web site earlier than you get on the roof. As at all times, don’t tackle a activity except you are feeling it’s inside your skills. In the event you want, most RV service suppliers can do that for you, and it’s a pretty straightforward job, so it shouldn’t be all that costly.

My brother has a Monaco Diplomat similar to ours, and he requested me a query the opposite day, and the identical challenge has puzzled me once in a while. The query is that this: In case you are plugged into, say, 30-amp shore energy, and you’ve got calls for like air con, microwave, and so on. exceeding your supply, are you able to begin your genset and increase your watts with out disconnecting the bottom energy?

A beautiful sunset sky at a Rv park in Rio Vista , Ca. along the shore of the delta

Picture: Getty Photos

Hello Loren:
The quick reply is sure and no. You may’t use the generator to complement your shore energy in most rigs. Most RVs with put in turbines are outfitted with a switch swap that’s designed to disconnect your shore energy connection and join the generator’s output to your rig’s electrical system. It’s type of an both/or state of affairs. Rigs with out automated switch switches could require you to plug the rig’s shore energy cable into an outlet on the rig that the generator feeds. Different RVs can have a swap that can switch the enter aspect of the rig’s AC energy system from the shore energy twine to the generator when the generator begins supplying energy. That is executed to forestall your energy twine from turning into “scorching” when the generator is operating and to forestall your generator output from feeding again into the shore energy receptacle. If the shore energy isn’t capable of deal with the load, you’ll be able to safely begin the generator in most RVs with the shore energy twine plugged in, because the switch swap will disconnect the shore energy enter and swap all AC masses to the generator robotically. It received’t be a “shared” load, although.

How do you verify a converter/charger to see whether it is working correctly? I don’t imagine that mine is trickle-charging my battery.

Hello George,
Right here’s a easy check that’s very easy, and all you want is a digital voltmeter. Go away the RV plugged into shore energy in a single day, after which verify the voltage straight on the terminals of the home battery(s) along with your meter. In case you are studying 13.2 to 13.8 volts, then your converter might be tremendous. Whether it is beneath 13v, likelihood is your converter is damaged, shouldn’t be getting AC energy, or the connection between the battery financial institution and the converter is open. If the reply is “not one of the above” or your voltages are method out of vary, get an RV tech to take a look at the system.

Hello Mark,
Have you learnt any method to enhance the effectivity of my basement residential AC unit in my Winnebago motorhome? I like the motorhome, however I undoubtedly want extra cooling. Can a rooftop unit be put in within the place of the Implausible vent system within the coach? I might use this to complement the principle unit on a scorching day.

Hello Chuck,
Earlier than you look into including an air conditioner, take a very good have a look at the basement unit to verify there aren’t any easy-to-fix points. Make certain the consumption air filter is clear and the cooling coils are freed from any dust or fuzz buildup. Additionally verify the condenser coils. Filth can actually cut back the effectivity of the warmth switch. Verify your handbook for assist in figuring out the varied parts of your basement system and for cleansing procedures. Additionally, verify each the provision and return air ducting wherever potential. It isn’t unusual to search out locations the place the ductwork has come unfastened and created air leaks. It doesn’t take a lot of a leak to make an enormous distinction in cooling functionality. Lastly, with the unit working, check the air temp at each the consumption and on the outlet. It’s best to see no less than a 20-degree temperature drop by the system. If every part appears to be like good and you continue to want extra cooling, then it’s undoubtedly potential so as to add roof air to any customary roof vent. The largest challenge is getting energy to it. Typically, it will likely be a undertaking for a very good RV service facility.

White cowel of a roof-mounted air conditioning unit

Picture: Tenting World

I’ve a Quotation journey trailer, and my AC retains tripping the circuit breaker. This occurs even when it’s on low or solely on the fan. I’ve already had a brand new thermostat and board put in when the AC appeared to “cycle” (at all times ran, by no means shut off when reached temp). I’ve additionally changed the converter. New ACs may be very costly ($1200) and I’m hoping that isn’t the subsequent step. Do you’ve gotten any options apart from a expensive substitute?

Hello Joyce,
If the A/C is tripping the breaker even when it’s on “fan solely,” then there could also be both a wiring downside, an issue with the A/C fan or controls, or the circuit breaker itself could also be failing. Usually, the fan-only setting shouldn’t draw sufficient present to journey the breaker. I’d first exchange the AC circuit breaker for the air conditioner. Breakers do fail often, and it’s a reasonable and comparatively straightforward factor to strive first. If changing the breaker doesn’t clear up the issue, then it’s worthwhile to have a certified service particular person take a look at the wiring and the A/C unit for issues. A tripping breaker signifies an overload situation or a brief circuit, so for security’s sake, the issue must be recognized and corrected, a.s.a.p.


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