GreyStone Gas Range HFK2421A Valve & Burner Assembly Replacement

Compatibility with the Greystone HFK2421A and inclusion of its rear-burner gas valve have not been verified. Do not order this Furrion assembly as a confirmed cure for the reported leak. Lippert's current manufacturer listing identifies SKU 2021124294 and reference C-FGH4ZSA-SS-Burner as a burner assembly for FGH4ZSA-SS. It does not supply a documented cross-reference to HFK2421A or an itemized kit list confirming the requested valve. Quantity one means one listed item, not proof of a complete valve-and-burner kit.

The ERVP Furrion burner listing is retained for exact-part identification, not as an approved Greystone substitute. A burner, injector, manifold/control valve and complete gas train are different components; their names or appearance do not establish interchangeability. Verify the appliance's full rating-plate model, serial/revision and the failed component's manufacturer part number against the exact Greystone parts drawing or written supplier confirmation.

The required rear-burner valve, its connection/orientation, approved application and the contents of any replacement assembly remain unconfirmed. This answer does not establish that the Furrion part contains that valve, that an adapter or modification is allowed, or that replacing a burner will stop a valve leak. The exact HFK2421A service-part cross-reference is still needed before selecting a replacement.

Keep the range out of service while the reported gas leak is assessed by a qualified RV LP-gas service technician. Do not turn the LP supply back on based on this listing or an assumed part match. Inspection, the correct approved repair and the manufacturer's required leak and operating checks must establish that the appliance can return to service. This public answer is not an installation procedure or a promise of restored operation, repair timing, shipping or warranty coverage.