{"product_id":"dometic-replacement-relay-pc-board-for-tpr-a-550-rohs-compliant","title":"Dometic TPR A-550 Relay Control Board - Part# 290339711","description":"\u003cp\u003eThe Dometic TPR A-550 Relay Control Board is the command center for your RV's water heating system. This OEM control board manages the heating cycles, safety shutoffs, and operational modes of Dometic tankless water heaters. If your water heater won't ignite, cycles incorrectly, or shows error codes, a faulty relay control board is often the culprit.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eOEM Dometic replacement part for TPR A-550 heating systems\u003c\/li\u003e\n\u003cli\u003eControls ignition, flame detection, and thermal safety functions\u003c\/li\u003e\n\u003cli\u003eDirect replacement—no modifications required\u003c\/li\u003e\n\u003cli\u003eRestores full automatic operation and diagnostic capabilities\u003c\/li\u003e\n\u003cli\u003eCompatible with standard 120V RV electrical systems\u003c\/li\u003e\n\u003cli\u003eTested and verified before shipment\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\u003eDetails\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\u003e290339711\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\u003ctr\u003e\n\u003ctd\u003eSystem Compatibility\u003c\/td\u003e\n\u003ctd\u003eTPR A-550 Tankless Water Heater\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e120V AC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFunction\u003c\/td\u003e\n\u003ctd\u003eRelay control and ignition management\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstallation\u003c\/td\u003e\n\u003ctd\u003ePlug-and-play replacement\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 relay control board is bad?\u003c\/strong\u003e\u003cbr\u003eA: Common signs include: water heater won't turn on, ignition clicks but no flame, system cycles on and off repeatedly, or error lights remain on. A multimeter test of the board terminals can confirm failure.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ: Will this work with my older Dometic water heater?\u003c\/strong\u003e\u003cbr\u003eA: This board is designed specifically for TPR A-550 systems. Check your heater's model number on the front panel or in your RV documentation. Using the correct part number ensures compatibility.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ: Is installation difficult?\u003c\/strong\u003e\u003cbr\u003eA: Most RV owners can replace this board in 10-15 minutes. Disconnect power, locate the board (usually mounted inside the heater cabinet), unplug the connector, and swap in the new unit. Refer to your heater's manual for exact location.\u003c\/p\u003e\u003ch3\u003eWhy Choose Elkhart RV Parts\u003c\/h3\u003e\u003cp\u003eWe specialize in hard-to-find Dometic replacement parts for RV owners who need the exact OEM component—not aftermarket substitutes. Shipping directly from Elkhart, Indiana, the RV capital of the world, we stock genuine parts and provide expert support to help you identify the right replacement. Every part is verified before it ships to ensure you get back on the road quickly.\u003c\/p\u003e","brand":"Dometic","offers":[{"title":"Default Title","offer_id":48315023491224,"sku":"290339711","price":225.28,"currency_code":"USD","in_stock":true}],"url":"https:\/\/elkhartrvparts.com\/products\/dometic-replacement-relay-pc-board-for-tpr-a-550-rohs-compliant","provider":"Elkhart RV Parts","version":"1.0","type":"link"}