{"product_id":"dometic-50-5-mfd-ac-run-capacitor-3313107-018","title":"Dometic 50\/5 MFD AC Run Capacitor 3313107.018","description":"\u003cp class=\"nvn-hero\"\u003eThe Dometic 3313107.018 is the factory-spec dual run capacitor for 13,500 BTU rooftop air conditioners. Rated 50\/5 MFD, it feeds both the compressor and the fan motor from one case, so a tired capacitor can't keep your AC from starting on a hot day.\u003c\/p\u003e\n\n\u003cdiv class=\"nvn-description\"\u003e\n\u003cp\u003eWhen a Dometic 13,500 BTU rooftop air conditioner quits blowing cold, the run capacitor is one of the first parts we check. This is the Dometic 3313107.018, a dual run capacitor rated at 50\/5 MFD, and it's the factory-spec part for those units. One case, two jobs. The 50 microfarad side feeds the compressor, and the 5 microfarad side keeps the fan motor turning. When it weakens, the whole unit struggles.\u003c\/p\u003e\n\u003cp\u003eHere's what a tired capacitor looks like in the real world. You flip the AC on and hear a hum, but the compressor never kicks over. Or it starts, runs for a minute, then trips the breaker. Sometimes the fan spins slow or not at all. Those are classic signs the capacitor has lost capacitance, and on a hot afternoon in a closed-up rig or a boat cabin, it's the difference between comfortable and miserable. A run capacitor stores and releases the energy the motor windings need to get moving and hold a steady draw. Once it drifts out of spec, the motor pulls more amps, runs hotter, and eventually gives up.\u003c\/p\u003e\n\u003cp\u003eThis part is a direct replacement. It matches the original 50\/5 MFD value, so you're not guessing at substitutions or stacking two separate capacitors to fake the dual rating. Match the value, wire it back the way it came off, and the unit pulls normal amps again. We always tell folks to snap a photo of the terminal connections before pulling the old one, because getting the compressor and fan leads back on the right posts matters.\u003c\/p\u003e\n\u003cp\u003eA quick safety word, because it's important. Capacitors hold a charge even after the power is off. Before you touch the terminals, kill the breaker and the shore power, then discharge the old capacitor with an insulated screwdriver across the terminals. It's a two-second habit that keeps a stored jolt from surprising you. If you're not comfortable working around AC line voltage, this is a job worth handing to a tech.\u003c\/p\u003e\n\u003cp\u003eOn the water, we see a couple of things worth mentioning. Salt air is hard on capacitor terminals, so a dab of dielectric grease on the connections during install slows corrosion and keeps the contact clean. And on boats running off weaker shore power, a compressor that's slow to start puts extra strain on the capacitor. If your unit has always been a hard starter, a hard-start kit paired with a healthy capacitor takes the load off. Give the capacitor box some airflow too. Mounted next to a hot engine room or buried with no ventilation, any capacitor ages faster.\u003c\/p\u003e\n\u003cp\u003eFitment is straightforward. This 50\/5 MFD value is the factory spec for Dometic 13,500 BTU rooftop air conditioners, the same platform used across a lot of RV and marine installs. If your unit calls for 50\/5 MFD and uses Dometic part 3313107.018, this is your part. If you're not sure, pull your old capacitor and read the printed rating on the side before ordering. The value is stamped right on the can.\u003c\/p\u003e\n\u003cp\u003eIf you want to confirm the capacitor before you swap it, a multimeter with a capacitance setting reads it in seconds. Discharge it first, disconnect the leads, and check each section against its printed value. A good 50 microfarad section should read close to 50, and the 5 microfarad side close to 5. Anything well below that tells you the capacitor has drifted and it's time for a fresh one. It's the cheapest test in the toolbox, and it saves you chasing the wrong part.\u003c\/p\u003e\n\u003cp\u003eIt's a small part with a big job. A component that, when it fails, takes your whole air conditioner down with it. Keeping a spare in the parts bin isn't a bad idea if you spend real time off the grid or offshore, where a failed AC on a 100-degree day isn't just annoying. Replace it with the correct value, respect the stored charge, and your Dometic unit goes right back to cooling like it should.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul class=\"nvn-features\"\u003e\n  \u003cli\u003eDual run capacitor rated 50\/5 MFD, so one component serves both the compressor and the fan motor\u003c\/li\u003e\n  \u003cli\u003eDirect OEM replacement for Dometic part 3313107.018, drops into 13,500 BTU rooftop units without rewiring\u003c\/li\u003e\n  \u003cli\u003e50 microfarad compressor section restores the startup and running current the compressor motor needs\u003c\/li\u003e\n  \u003cli\u003e5 microfarad fan section keeps the evaporator and condenser fan spinning at full speed\u003c\/li\u003e\n  \u003cli\u003eMatches the factory 50\/5 MFD value exactly, so the air conditioner pulls its normal amp draw again\u003c\/li\u003e\n  \u003cli\u003eFits both RV and marine 13,500 BTU rooftop air conditioners built on the same Dometic platform\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cdiv class=\"nvn-trust\"\u003e\n  \u003ch2\u003eWhy Buy from NVN Marine\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eAuthorized Dometic reseller, full manufacturer warranty\u003c\/li\u003e\n    \u003cli\u003eNMEA member and ABYC certified, advice from real boat techs\u003c\/li\u003e\n    \u003cli\u003eSame-day shipping before 3 PM ET on in-stock items\u003c\/li\u003e\n    \u003cli\u003eNY headquarters and Fort Lauderdale flagship retail store\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdiv class=\"nvn-faq\"\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat does the 50\/5 MFD rating mean?\u003c\/summary\u003e\n    \u003cp\u003eIt's a dual run capacitor. The 50 microfarad section serves the compressor motor and the 5 microfarad section serves the fan motor, both housed in one case.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhich air conditioners does this fit?\u003c\/summary\u003e\n    \u003cp\u003eIt's the factory-spec run capacitor for Dometic 13,500 BTU rooftop air conditioners that use part 3313107.018. Check your old capacitor's printed rating and part number before ordering.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow do I know my run capacitor has failed?\u003c\/summary\u003e\n    \u003cp\u003eCommon signs are the compressor humming but not starting, the unit tripping the breaker shortly after startup, or the fan spinning slowly or not at all.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eCan I replace it myself?\u003c\/summary\u003e\n    \u003cp\u003eMany owners do, but capacitors hold a charge. Kill the breaker and shore power, discharge the old capacitor across its terminals with an insulated screwdriver, and photograph the wiring first. If you're not comfortable around AC line voltage, hand it to a tech.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eDoes this work in marine air conditioners?\u003c\/summary\u003e\n    \u003cp\u003eYes. The same 50\/5 MFD Dometic capacitor is used in marine and RV rooftop units. In salt air, add a little dielectric grease on the terminals to slow corrosion.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eMy AC starts then shuts off. Is it the capacitor?\u003c\/summary\u003e\n    \u003cp\u003eA weak capacitor is a common cause. When it drifts out of spec the compressor pulls extra amps and can trip on overload. Testing or replacing the capacitor with the correct value is a good first step.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eDo I need a hard-start kit too?\u003c\/summary\u003e\n    \u003cp\u003eNot always. If your unit has always been slow to start, especially on weaker shore power, a hard-start kit paired with a healthy capacitor eases the compressor's startup load.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eCan I substitute a different capacitance value?\u003c\/summary\u003e\n    \u003cp\u003eMatch the factory value. This part replaces the original 50\/5 MFD rating exactly, so there's no need to guess at substitutes or wire two separate capacitors together.\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable class=\"nvn-specs\"\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003cth\u003eTitle\u003c\/th\u003e\n\u003ctd\u003eDometic 50\/5 MFD Run Capacitor for 13,500 BTU AC Units\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eDometic\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eManufacturer Part Number\u003c\/th\u003e\n\u003ctd\u003e3313107.018\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eUPC\u003c\/th\u003e\n\u003ctd\u003e713814213916\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eDistributor Part Number\u003c\/th\u003e\n\u003ctd\u003eD7E3313107018\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eCapacitance\u003c\/th\u003e\n\u003ctd\u003e50\/5 MFD\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eCompressor Section\u003c\/th\u003e\n\u003ctd\u003e50 MFD\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eFan Section\u003c\/th\u003e\n\u003ctd\u003e5 MFD\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eComponent Type\u003c\/th\u003e\n\u003ctd\u003eDual run capacitor\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eRooftop RV and marine air conditioners\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eCooling Capacity Supported\u003c\/th\u003e\n\u003ctd\u003e13,500 BTU\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eMeasurement Unit\u003c\/th\u003e\n\u003ctd\u003eMicrofarad (MFD)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n    \"@context\": \"https:\/\/schema.org\",\n    \"@type\": \"FAQPage\",\n    \"mainEntity\": [\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What does the 50\/5 MFD rating mean?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It's a dual run capacitor. The 50 microfarad section serves the compressor motor and the 5 microfarad section serves the fan motor, both housed in one case.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Which air conditioners does this fit?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It's the factory-spec run capacitor for Dometic 13,500 BTU rooftop air conditioners that use part 3313107.018. Check your old capacitor's printed rating and part number before ordering.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"How do I know my run capacitor has failed?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Common signs are the compressor humming but not starting, the unit tripping the breaker shortly after startup, or the fan spinning slowly or not at all.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Can I replace it myself?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Many owners do, but capacitors hold a charge. Kill the breaker and shore power, discharge the old capacitor across its terminals with an insulated screwdriver, and photograph the wiring first. 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Testing or replacing the capacitor with the correct value is a good first step.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Do I need a hard-start kit too?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Not always. If your unit has always been slow to start, especially on weaker shore power, a hard-start kit paired with a healthy capacitor eases the compressor's startup load.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Can I substitute a different capacitance value?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Match the factory value. This part replaces the original 50\/5 MFD rating exactly, so there's no need to guess at substitutes or wire two separate capacitors together.\"\n            }\n        }\n    ]\n}\n\u003c\/script\u003e\n","brand":"Dometic","offers":[{"title":"Default Title","offer_id":45066541989981,"sku":"2008888","price":65.39,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0299\/7266\/0317\/files\/ImageServerAPI_c92ad9d3-5fc5-4cf3-934c-c712cb1d2ce0.jpg?v=1789645360","url":"https:\/\/nvnmarine.com\/products\/dometic-50-5-mfd-ac-run-capacitor-3313107-018","provider":"NVN Marine","version":"1.0","type":"link"}