{"product_id":"dometic-55-5-mfd-370v-ac-run-capacitor-3313107-036","title":"Dometic 55\/5 MFD 370V AC Run Capacitor 3313107.036","description":"\u003cp class=\"nvn-hero\"\u003eWhen your Dometic high-efficiency rooftop AC won't start or the fan drags, the run capacitor is usually the culprit. This is the factory replacement, part 3313107.036, a dual 55\/5 MFD capacitor rated for 370 volts AC. Correct microfarad, correct voltage, correct size for a clean drop-in. Get your air back on without a service call.\u003c\/p\u003e\n\n\u003cdiv class=\"nvn-description\"\u003e\n\u003cp\u003eIf your Dometic high-efficiency rooftop air conditioner won't kick on, hums but doesn't start, or the fan spins slow while the compressor sits dead, the run capacitor is the first part to check. This is the factory Dometic replacement, part number 3313107.036, a dual run capacitor rated 55\/5 MFD at 370 volts AC. It's the same size and rating the unit shipped with, so you're not guessing at fitment.\u003c\/p\u003e\n\u003cp\u003eHere's what the 55\/5 rating actually means. This is a dual capacitor, so it does two jobs in one can. The 55 microfarad side feeds the compressor motor, the big draw that does the cooling. The 5 microfarad side runs the fan motor that moves air across the coils. One part, two circuits. That's why a single bad capacitor can leave you with a compressor that won't start and a fan that barely turns, or any combination in between.\u003c\/p\u003e\n\u003cp\u003eCapacitors are the most common failure point on an RV rooftop AC, and they don't always fail dramatically. Sometimes the top bulges. Sometimes it looks fine and just quietly loses capacitance until the compressor can't get the kick it needs to start. When that happens you'll often hear a low hum followed by the breaker tripping, or the compressor cycling on the thermal overload every few minutes. Swapping the capacitor is usually a fifteen-minute fix and a fraction of the cost of a service call.\u003c\/p\u003e\n\u003cp\u003eThe physical size matters as much as the electrical rating. This one measures 4-1\/4 inches tall and 2-1\/2 inches in diameter, sized to drop into the capacitor bracket inside a Dometic high-efficiency unit without fighting the cover. Before you order, pop the shroud and confirm your old cap reads 55\/5 MFD 370V on the data label. Ratings vary across BTU sizes, and putting the wrong microfarad value in will run the motors hot.\u003c\/p\u003e\n\u003cp\u003eA word on the wiring, because this trips people up. The terminals are marked, typically HERM for the compressor, FAN for the fan, and C for common. Before you pull a single wire, snap a photo or label each lead. Get them crossed and the motors won't run right. And always discharge the old capacitor across a resistor or an insulated screwdriver before you touch the terminals. These hold a charge even with the power off, and 370 volts stored in a can will get your attention.\u003c\/p\u003e\n\u003cp\u003eNot sure the capacitor is your problem? A cheap multimeter with a capacitance setting will tell you fast. Disconnect power, discharge the cap, pull the leads, and read each side. The 55 microfarad terminal should read close to 55, and the 5 microfarad side close to 5. If either side reads low, open, or shorted, replace it. A capacitor that measures fine while the AC still won't start points you toward the motor or the control board instead, so you're not throwing money at the wrong part.\u003c\/p\u003e\n\u003cp\u003eThe 370 volt AC rating is the working voltage the capacitor is built to handle continuously, and it's the correct spec for these Dometic units. Heat is what ages a capacitor fastest, so if you run in consistently high ambient temperatures, keep an eye on service life. Mount it back in its bracket so it isn't rattling loose, and it'll give you seasons of reliable starts.\u003c\/p\u003e\n\u003cp\u003eThis replacement suits first-time owners and seasoned techs alike. If you've never opened up a rooftop unit, the job is approachable as long as you kill the breaker, discharge the old cap, and label your wires. If you do your own service every spring, keeping one of these on the shelf means a dead AC on a hot afternoon is a quick swap instead of a lost weekend. Bottom line, if you've diagnosed a weak or failed capacitor on your Dometic high-efficiency air conditioner, this is the exact-match part. Right microfarad, right voltage, right size. Get it in, get your air back on.\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 55\/5 MFD: one part handles both the compressor (55 microfarad) and fan motor (5 microfarad) circuits\u003c\/li\u003e\n  \u003cli\u003e370 volt AC working voltage, the correct rating for Dometic high-efficiency air conditioners\u003c\/li\u003e\n  \u003cli\u003eFactory Dometic part number 3313107.036 for an exact-match replacement\u003c\/li\u003e\n  \u003cli\u003e4-1\/4 inch height by 2-1\/2 inch diameter, sized to drop into the stock capacitor bracket\u003c\/li\u003e\n  \u003cli\u003eRestores reliable compressor starts when the AC hums, trips the breaker, or won't cool\u003c\/li\u003e\n  \u003cli\u003eMarked HERM, FAN, and C terminals for straightforward rewiring\u003c\/li\u003e\n  \u003cli\u003eA common wear part and an inexpensive fix compared with a full service call\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 55\/5 MFD rating mean?\u003c\/summary\u003e\n    \u003cp\u003eIt's a dual run capacitor. The 55 microfarad side serves the compressor motor and the 5 microfarad side serves the fan motor, so one can handles both circuits.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWill this fit my Dometic air conditioner?\u003c\/summary\u003e\n    \u003cp\u003eIt's the factory part 3313107.036 for Dometic high-efficiency units, rated 55\/5 MFD at 370V. Pop the shroud and confirm your old capacitor reads 55\/5 MFD 370V before ordering, since ratings vary by BTU size.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow do I know my capacitor has failed?\u003c\/summary\u003e\n    \u003cp\u003eCommon signs are the compressor humming but not starting, the breaker tripping, a slow fan, or a bulged top on the old cap. A multimeter with a capacitance setting confirms it.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eCan I use a 440 volt capacitor instead?\u003c\/summary\u003e\n    \u003cp\u003eThis unit is rated at 370 volts AC, which is the correct working voltage for these Dometic air conditioners. Match the microfarad value and voltage shown on your data label.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow is it wired?\u003c\/summary\u003e\n    \u003cp\u003eThe terminals are marked HERM for the compressor, FAN for the fan, and C for common. Label or photograph your leads before removing them so they go back the same way.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eDo I need to discharge the old capacitor first?\u003c\/summary\u003e\n    \u003cp\u003eYes. Capacitors hold a charge even with the power off. Discharge it across a resistor or an insulated screwdriver before touching the terminals.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat are the dimensions?\u003c\/summary\u003e\n    \u003cp\u003eIt measures 4-1\/4 inches tall and 2-1\/2 inches in diameter overall, sized for the stock capacitor bracket.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eIs this hard to replace myself?\u003c\/summary\u003e\n    \u003cp\u003eFor most owners it's about a fifteen-minute job. Kill the breaker, discharge the old cap, label the wires, and swap it in. If you're unsure, have a tech handle it.\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 55\/5 MFD 370V AC Run Capacitor\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\u003e3313107.036\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eUPC\u003c\/th\u003e\n\u003ctd\u003e713814239299\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\u003eCapacitance Rating\u003c\/th\u003e\n\u003ctd\u003e55\/5 MFD (Microfarad)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eCompressor (HERM) Capacitance\u003c\/th\u003e\n\u003ctd\u003e55 MFD\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eFan Motor (FAN) Capacitance\u003c\/th\u003e\n\u003ctd\u003e5 MFD\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eVoltage Rating\u003c\/th\u003e\n\u003ctd\u003e370 Volt AC\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eOverall Height\u003c\/th\u003e\n\u003ctd\u003e4-1\/4 Inch\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eOverall Diameter\u003c\/th\u003e\n\u003ctd\u003e2-1\/2 Inch\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eDometic High Efficiency Air Conditioner\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 55\/5 MFD rating mean?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It's a dual run capacitor. The 55 microfarad side serves the compressor motor and the 5 microfarad side serves the fan motor, so one can handles both circuits.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Will this fit my Dometic air conditioner?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It's the factory part 3313107.036 for Dometic high-efficiency units, rated 55\/5 MFD at 370V. Pop the shroud and confirm your old capacitor reads 55\/5 MFD 370V before ordering, since ratings vary by BTU size.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"How do I know my capacitor has failed?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Common signs are the compressor humming but not starting, the breaker tripping, a slow fan, or a bulged top on the old cap. A multimeter with a capacitance setting confirms it.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Can I use a 440 volt capacitor instead?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"This unit is rated at 370 volts AC, which is the correct working voltage for these Dometic air conditioners. Match the microfarad value and voltage shown on your data label.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"How is it wired?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"The terminals are marked HERM for the compressor, FAN for the fan, and C for common. Label or photograph your leads before removing them so they go back the same way.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Do I need to discharge the old capacitor first?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Yes. Capacitors hold a charge even with the power off. Discharge it across a resistor or an insulated screwdriver before touching the terminals.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What are the dimensions?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It measures 4-1\/4 inches tall and 2-1\/2 inches in diameter overall, sized for the stock capacitor bracket.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Is this hard to replace myself?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"For most owners it's about a fifteen-minute job. Kill the breaker, discharge the old cap, label the wires, and swap it in. If you're unsure, have a tech handle it.\"\n            }\n        }\n    ]\n}\n\u003c\/script\u003e\n","brand":"Dometic","offers":[{"title":"Default Title","offer_id":45064591999069,"sku":"2011364","price":79.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0299\/7266\/0317\/files\/ImageServerAPI_11e5d6d7-bcbd-46f7-b5db-eb2260fef92e.jpg?v=1789599786","url":"https:\/\/nvnmarine.com\/products\/dometic-55-5-mfd-370v-ac-run-capacitor-3313107-036","provider":"NVN Marine","version":"1.0","type":"link"}