{"product_id":"erp-replacement-wall-thermostat-9204v","title":"Heat-Only HVAC Wall Thermostat For: Universal 275-40A 9204V ER9204V","description":"\u003ch2\u003eERP 9204V Vertical Heat-Only HVAC Wall Thermostat\u003c\/h2\u003e\u003cp\u003eThis ERP aftermarket vertical mechanical wall thermostat is designed for compatible single-stage gas or electric heating systems. It provides heat-only SPST control for low-voltage HVAC applications and is not a line-voltage baseboard thermostat. Verify the complete heating system, wiring, voltage, terminal configuration, and anticipator requirements before ordering.\u003c\/p\u003e\u003ch3\u003eProduct Details\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eProduct type: Vertical mechanical heat-only wall thermostat.\u003c\/li\u003e\n\u003cli\u003eCatalog application label: Universal.\u003c\/li\u003e\n\u003cli\u003eControl: Single-stage heat-only SPST.\u003c\/li\u003e\n\u003cli\u003eElectrical rating: 24 VAC, 2 A maximum.\u003c\/li\u003e\n\u003cli\u003eDial range: 50–90°F.\u003c\/li\u003e\n\u003cli\u003eMillivolt compatibility may apply when the required anticipator setup is used, as specified by the manufacturer.\u003c\/li\u003e\n\u003cli\u003eNot for line-voltage baseboard or other high-voltage circuits.\u003c\/li\u003e\n\u003cli\u003eSKU \/ ERP identifier: ER9204V.\u003c\/li\u003e\n\u003cli\u003ePrimary part number: 9204V.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCross-Reference Part Numbers\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e275-40A\u003c\/li\u003e\n\u003cli\u003e9204V\u003c\/li\u003e\n\u003cli\u003eER9204V\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eUniversal is a catalog application label, not a guarantee of fit to every appliance, brand, or model. This ERP part is not represented as a genuine OEM product. Match the original thermostat, full equipment model, wiring, control type, and configuration before ordering.\u003c\/p\u003e\u003ch3\u003eWhat This Thermostat Is Designed To Do\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eControl a compatible single-stage heat-only call.\u003c\/li\u003e\n\u003cli\u003eProvide manual temperature control through the mechanical dial.\u003c\/li\u003e\n\u003cli\u003eReplace a matching low-voltage wall thermostat that is worn, damaged, or no longer responding correctly.\u003c\/li\u003e\n\u003cli\u003eSupport compatible gas, electric, or manufacturer-specified millivolt applications when installed with the required anticipator setup.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFixes These Symptoms\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eHeating system does not start when the thermostat calls for heat.\u003c\/li\u003e\n\u003cli\u003eHeating system runs continuously after the set temperature is reached.\u003c\/li\u003e\n\u003cli\u003eThermostat dial or contacts are worn, damaged, or unreliable.\u003c\/li\u003e\n\u003cli\u003eTemperature control is inaccurate or inconsistent.\u003c\/li\u003e\n\u003cli\u003eHeat call is intermittent after the HVAC wiring and equipment are confirmed.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eThese symptoms can also be caused by the furnace, boiler, gas valve, wiring, transformer, fuse, limit control, or other heating-system components. Diagnose the system before replacing the thermostat.\u003c\/p\u003e\u003ch3\u003eCompatible Brands and Models\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eApplication label:\u003c\/strong\u003e Universal.\u003c\/p\u003e\u003cp\u003eFits various models. Please verify compatibility with us before ordering. Similar appearance or part-number similarity alone does not establish fitment.\u003c\/p\u003e\u003ch3\u003eBefore Ordering\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eConfirm the system is heat-only and single-stage.\u003c\/li\u003e\n\u003cli\u003eConfirm the circuit is low voltage and matches the 24 VAC, 2 A maximum rating.\u003c\/li\u003e\n\u003cli\u003eConfirm whether the application is gas, electric, or manufacturer-specified millivolt and follow the required anticipator setup.\u003c\/li\u003e\n\u003cli\u003eCompare the original thermostat terminals, vertical mounting footprint, and control type.\u003c\/li\u003e\n\u003cli\u003eDo not use this thermostat on a line-voltage baseboard or other high-voltage circuit.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eInstallation and Safety\u003c\/h3\u003e\u003col\u003e\n\u003cli\u003eDisconnect HVAC control power before service and verify the circuit is de-energized.\u003c\/li\u003e\n\u003cli\u003ePhotograph and label the original wires by terminal position. Never infer connections from wire color.\u003c\/li\u003e\n\u003cli\u003eFollow the manufacturer terminal diagram and anticipator instructions for the exact application and control revision.\u003c\/li\u003e\n\u003cli\u003eDo not jumper gas-valve or system-control terminals to test the system.\u003c\/li\u003e\n\u003cli\u003eMount the thermostat securely, restore power, and run a supervised heating-cycle test.\u003c\/li\u003e\n\u003cli\u003eUse a qualified HVAC technician when wiring, system voltage, millivolt operation, or compatibility is uncertain.\u003c\/li\u003e\n\u003c\/ol\u003e\u003cp\u003eThis is preparation guidance, not a complete model-specific repair procedure. Review the manufacturer documents for qualified service and confirm their scope before installation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eProp 65 Warning:\u003c\/strong\u003e Cancer and Reproductive Harm – www.P65Warnings.ca.gov\u003c\/p\u003e\u003cp\u003e\u003ca href=\"https:\/\/www.robertshaw.com\/wp-content\/uploads\/2026\/04\/352-00300-001_9200-and-9204-Robertshaw-Mechanical-Thermostat-Install-Manual.pdf\"\u003eManufacturer installation manual\u003c\/a\u003e\u003c\/p\u003e\u003cp\u003e\u003ca href=\"https:\/\/www.robertshaw.com\/parts\/wall-thermostats\/9200-series-mechanical-thermostats\/9204v\/\"\u003eManufacturer product\/application reference\u003c\/a\u003e\u003c\/p\u003e","brand":"ERP","offers":[{"title":"Default Title","offer_id":50280611545331,"sku":"ER9204V","price":47.51,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0774\/7859\/2755\/files\/9204V-robertshaw.jpg?v=1788462673","url":"https:\/\/authenticapplianceparts.com\/ja\/products\/erp-replacement-wall-thermostat-9204v","provider":"Authentic Appliance Parts","version":"1.0","type":"link"}