{"product_id":"coleman-mach-ptcr-start-relay-1497-9021","title":"Coleman Mach PTCR Start Relay 1497-9021","description":"\u003cp class=\"nvn-hero\"\u003eThe genuine Coleman PTCR start device, part 1497-9021, for Mach rooftop air conditioners. It's the start relay only, sold without a capacitor, so you replace just the part that failed when your compressor hums but won't spin up.\u003c\/p\u003e\n\n\u003cdiv class=\"nvn-description\"\u003e\n\u003cp\u003eWhen a Coleman Mach rooftop air conditioner hums but the compressor won't spin up, the PTCR start device is one of the first things a good tech checks. This is the genuine Coleman start relay, part number 1497-9021. It's the relay only, sold without the run capacitor, so it drops right in when the start device is what's failed and the rest of your control gear is still good.\u003c\/p\u003e\n\u003cp\u003ePTCR stands for positive temperature coefficient resistor. In plain terms, it's a small solid-state part that gives the compressor motor the electrical kick it needs to get moving, then backs itself out of the circuit once the motor is up to speed. There are no mechanical contacts to burn or stick like an old-style relay. When one goes bad, you usually get the tell-tale symptom. The AC clicks on, the fan runs, but the compressor just buzzes and trips the breaker or shuts down on overload. Swap the start device and, more often than not, cold air comes right back.\u003c\/p\u003e\n\u003cp\u003eThis part fits a wide range of Coleman Mach units. The compatibility list covers dozens of Mach model numbers, from the 6000 and 7000 series through the 8000 and 9000 series and many of the 48000-series units. Check your unit's model number against the fitment list before you order. The model plate is usually on the ceiling assembly inside or on the shroud up top.\u003c\/p\u003e\n\u003cp\u003eA couple of honest notes. This is the start relay by itself. It doesn't include the capacitor, so if your capacitor is also swollen or reading out of spec, you'll want to replace that separately. And it sits on the live AC side of the wiring, so kill the shore power and unplug before you go poking around on the roof. If you're comfortable pulling the AC shroud and reading a wiring diagram, it's a quick job. If not, any RV tech can handle it fast.\u003c\/p\u003e\n\u003cp\u003eWe keep genuine Coleman RVP parts in stock because guessing on AC components wastes a hot afternoon at the campground. Match your model, confirm you need the relay and not the full start kit, and you're set.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul class=\"nvn-features\"\u003e\n  \u003cli\u003eGenuine Coleman PTCR start device, part number 1497-9021, for Mach rooftop air conditioners\u003c\/li\u003e\n  \u003cli\u003eRelay only, supplied without a run capacitor, so you replace just the part that failed\u003c\/li\u003e\n  \u003cli\u003eSolid-state PTCR design with no mechanical contacts to burn out or stick\u003c\/li\u003e\n  \u003cli\u003eGives the compressor the start boost it needs, then drops out of the circuit once it's running\u003c\/li\u003e\n  \u003cli\u003eFits a wide range of Coleman Mach models across the 6000, 7000, 8000, 9000, and 48000 series\u003c\/li\u003e\n  \u003cli\u003eDirect-fit fix for a compressor that hums but won't start\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 Coleman 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 this PTCR start device actually do?\u003c\/summary\u003e\n    \u003cp\u003eIt gives the air conditioner's compressor motor the electrical boost it needs to start, then drops out of the circuit once the motor is running. When it fails, the compressor typically hums but won't spin up.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eDoes this include the capacitor?\u003c\/summary\u003e\n    \u003cp\u003eNo. This is the start relay (PTCR) only, sold without a capacitor. If your capacitor is also bad or reading out of spec, you'll need to replace that separately.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhich Coleman Mach units does it fit?\u003c\/summary\u003e\n    \u003cp\u003eIt covers a long list of Mach models across the 6000, 7000, 8000, 9000, and 48000 series. Check your unit's model number against the compatibility list, found on the model plate on the ceiling assembly or the rooftop shroud, before ordering.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow do I know if my start device has failed?\u003c\/summary\u003e\n    \u003cp\u003eThe classic sign is that the fan runs and the unit clicks on, but the compressor just buzzes and won't start, sometimes tripping the breaker or shutting down on overload. A failed PTCR is a common cause of exactly that.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eIs this a genuine Coleman part?\u003c\/summary\u003e\n    \u003cp\u003eYes. This is the genuine Coleman RVP part, MPN 1497-9021.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eCan I replace it myself?\u003c\/summary\u003e\n    \u003cp\u003eIf you're comfortable pulling the AC shroud and reading a basic wiring diagram, it's a quick job. Cut the shore power and unplug first, since it's on the live AC side. If you'd rather not go up on the roof, any RV tech can swap it fast.\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\u003eColeman Mach PTCR Start Device (Start Relay)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eColeman\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eManufacturer\u003c\/th\u003e\n\u003ctd\u003eColeman RVP\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eManufacturer Part Number\u003c\/th\u003e\n\u003ctd\u003e1497-9021\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eUPC\u003c\/th\u003e\n\u003ctd\u003e755790410125\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eComponent Type\u003c\/th\u003e\n\u003ctd\u003ePTCR Start Device (Start Relay)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eCapacitor Included\u003c\/th\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eRV Rooftop Air Conditioner\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eCompatible Models\u003c\/th\u003e\n\u003ctd\u003eColeman Mach 46413, 48203, 48204, 48207, 48208, 48213, 48253, 48254, 48257, 48263, 48264, 48268, 6633, 6636, 7333, 7633, 8333, 8335, 8433, 8534, 8535, 8632, 8633, 9013, 9021, 9031, 9201, 9202, 9232, 6799, 46515, 48004, 48008, 48014, 48058, 48064, 48068, 6535, 6537, 9001, 9002, 9003, 9014, 9022, 9023, 9024, 9032, 9033, 9034\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 this PTCR start device actually do?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It gives the air conditioner's compressor motor the electrical boost it needs to start, then drops out of the circuit once the motor is running. When it fails, the compressor typically hums but won't spin up.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Does this include the capacitor?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"No. This is the start relay (PTCR) only, sold without a capacitor. If your capacitor is also bad or reading out of spec, you'll need to replace that separately.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Which Coleman Mach units does it fit?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It covers a long list of Mach models across the 6000, 7000, 8000, 9000, and 48000 series. Check your unit's model number against the compatibility list, found on the model plate on the ceiling assembly or the rooftop shroud, before ordering.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"How do I know if my start device has failed?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"The classic sign is that the fan runs and the unit clicks on, but the compressor just buzzes and won't start, sometimes tripping the breaker or shutting down on overload. A failed PTCR is a common cause of exactly that.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Is this a genuine Coleman part?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Yes. This is the genuine Coleman RVP part, MPN 1497-9021.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Can I replace it myself?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"If you're comfortable pulling the AC shroud and reading a basic wiring diagram, it's a quick job. Cut the shore power and unplug first, since it's on the live AC side. If you'd rather not go up on the roof, any RV tech can swap it fast.\"\n            }\n        }\n    ]\n}\n\u003c\/script\u003e\n","brand":"Coleman","offers":[{"title":"Default Title","offer_id":45078837067869,"sku":"2009930","price":23.09,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0299\/7266\/0317\/files\/ImageServerAPI_20d6c818-f4c3-4c74-8407-49517721fb31.jpg?v=1789945650","url":"https:\/\/nvnmarine.com\/products\/coleman-mach-ptcr-start-relay-1497-9021","provider":"NVN Marine","version":"1.0","type":"link"}