{"product_id":"dometic-3-4vw","title":"Dometic Thermostatic Expansion Valve R-22 3\/4 VW - Part# 290000129","description":"\u003cp\u003eThe Dometic thermostatic expansion valve (TXV) regulates refrigerant flow in your RV air conditioning system, maintaining optimal cooling performance and system efficiency. This R-22 compatible valve is essential for RV owners experiencing reduced AC cooling, temperature fluctuations, or compressor issues related to improper refrigerant metering.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eThermostatic operation automatically adjusts refrigerant flow based on evaporator temperature\u003c\/li\u003e\n\u003cli\u003eR-22 refrigerant compatible for legacy RV cooling systems\u003c\/li\u003e\n\u003cli\u003e3\/4 VW (Valve Weld) connection for secure, leak-free installation\u003c\/li\u003e\n\u003cli\u003ePrevents liquid slugging and compressor damage from improper refrigerant distribution\u003c\/li\u003e\n\u003cli\u003eOEM Dometic engineering ensures compatibility with original RV AC systems\u003c\/li\u003e\n\u003cli\u003eDirect replacement for failed or underperforming expansion valves\u003c\/li\u003e\n\u003c\/ul\u003e\u003ctable class=\"table table-bordered table-sm\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003e290000129\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRefrigerant Type\u003c\/td\u003e\n\u003ctd\u003eR-22\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnection Size\u003c\/td\u003e\n\u003ctd\u003e3\/4 VW (Valve Weld)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eValve Type\u003c\/td\u003e\n\u003ctd\u003eThermostatic Expansion Valve\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer\u003c\/td\u003e\n\u003ctd\u003eDometic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eQ: How do I know if my expansion valve needs replacement?\u003c\/strong\u003e\u003cbr\u003eA: Signs include weak or no cold air from vents, ice buildup on AC lines, compressor cycling on and off rapidly, or hissing sounds from the AC unit. A failing TXV cannot properly meter refrigerant flow.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ: Will this valve work with my RV's R-22 system?\u003c\/strong\u003e\u003cbr\u003eA: Yes, this valve is specifically designed for R-22 refrigerant systems common in older and mid-range RV air conditioning units. Do not use with R-410A systems.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ: Do I need professional installation?\u003c\/strong\u003e\u003cbr\u003eA: Thermostatic expansion valve replacement requires AC system evacuation and recharging. We recommend having a certified RV technician perform the installation to ensure proper refrigerant handling and system performance.\u003c\/p\u003e\u003ch3\u003eWhy Elkhart RV Parts\u003c\/h3\u003e\u003cp\u003eWe specialize in hard-to-find Dometic replacement parts and ship directly from Elkhart, Indiana — the RV capital of the world. Every part is genuine OEM Dometic equipment backed by expert support to help you get your RV cooling system running smoothly again.\u003c\/p\u003e","brand":"Dometic","offers":[{"title":"Default Title","offer_id":48363366514840,"sku":"290000129","price":516.05,"currency_code":"USD","in_stock":true}],"url":"https:\/\/elkhartrvparts.com\/products\/dometic-3-4vw","provider":"Elkhart RV Parts","version":"1.0","type":"link"}