Weber SUMMIT 425 LP outdoor grill - 425 lp Parts

To start your Weber SUMMIT LP gas grill, open the lid, confirm the LP cylinder is connected and the gas supply is on, then ignite the burner using the lighting steps in the SUMMIT owner's manual. If a burner goes out, turn all knobs OFF, wait 5 minutes, then relight.

Before you light it (quick safety checks)

• Keep combustibles at least 24 inches away from the top, bottom, back, and sides of the grill.
• Check for gas leaks and burner tube obstructions after storage or nonuse.
• Make sure the area under the control panel and bottom tray is clear of debris.
• Never use a flame to check for gas leaks.
• If you smell gas: turn the gas OFF and do not attempt to light until the issue is corrected.

Basic lighting steps (LP gas)

1. Open the lid before turning on gas or attempting ignition.
2. Turn the LP cylinder valve ON.
3. Set one burner control knob to START/HIGH (use the primary lighting burner first).
4. Use the grill’s igniter to light that burner.
5. Once lit, light the remaining burners as needed and set your cooking temperature.

If it will not light

• Turn all burner knobs OFF, keep the lid open, and wait 5 minutes before trying again.
• Confirm the LP cylinder has fuel and the regulator is properly connected.
• Inspect burner ports and tubes for blockage (spider webs and debris are common).
• Check that ignition wiring is secure and not damaged.

Symptom	Most common cause	What to do next
Clicking but no flame	Gas not reaching burners	Verify LP valve ON; check regulator connection
Flame lights then goes out	Draft, low gas flow, or dirty burners	Relight after 5 minutes; clean burner tubes
Uneven flame	Clogged ports or grease buildup	Clean burners and cooking box area

Why it matters

Lighting with the lid open and following the 5-minute wait rule helps prevent flare-ups and reduces the risk of fire or explosion from unburned gas.

For replacement parts and diagrams for your Weber SUMMIT grill, shop the model parts list or search by model on Sears PartsDirect.

Last updated: February 2026

Weber makes SUMMIT grills; the SUMMIT series is a Weber product line, and the operating guide for the SUMMIT 425 LP identifies Weber-Stephen Products Co. as the company behind the grill and its trademarks. For model SUMMIT parts and specs, use the SUMMIT owner's manual and shop by model on Sears PartsDirect.

What “SUMMIT” means for this grill

On this model page, SUMMIT refers to a Weber SUMMIT series LP gas barbecue (SUMMIT 425 LP). In the manual, Weber-Stephen Products Co. is listed in the trademarks and parts information, which ties the SUMMIT name directly to Weber.

How to confirm you have the right SUMMIT model

Because “SUMMIT” is a series name used across multiple grills (for example, SUMMIT 425 LP and SUMMIT 450 LP), matching the exact version helps you get the right replacement parts like burners, igniters, and the hose/regulator.

• Check the grill’s serial number label and compare it to the identification section in the manual
• Confirm fuel type: LP (propane) versus natural gas
• Match key assemblies called out in the manual (manifold assembly, igniter, hose/regulator)
• Use the model number exactly as shown on the rating label when searching parts

Common SUMMIT series components you may see referenced

These are typical SUMMIT 425 LP related items shown in the operating guide parts lists and diagrams.

Component	What it does	Why it matters
Hose/regulator	Controls and delivers LP gas to the manifold	Incorrect regulator can cause poor flame or unsafe operation
Manifold assembly	Distributes gas to the burners	Leaks or damage can affect multiple burners
Igniter and igniter wires	Creates spark for lighting	No-spark issues often trace back here
Burner control knobs	Adjusts burner output	Loose or damaged knobs affect control

Why it matters

Knowing Weber makes SUMMIT grills helps you use the correct documentation and safety procedures, especially leak checks and lighting steps for LP gas. It also helps you match factory-authorized replacement parts when you service burners, ignition, or gas delivery.

Last updated: February 2026

A Weber SUMMIT 425 LP gas grill (model SUMMIT) typically lasts 10 to 15 years with normal use when it’s kept clean, protected from the weather, and maintained (especially burners, grates, and grease management). For model-specific care steps, follow the owner's manual.

Typical lifespan and what affects it

Most SUMMIT-SERIES grills reach the 10 to 15 year range when these factors are controlled:

• Grease control: cleaning the bottom tray regularly helps prevent flare-ups and heat damage
• Burner health: keeping burner ports clear prevents uneven flames and hot spots
• Corrosion exposure: rain, salt air, and stored moisture shorten the life of the cookbox and hardware
• Fuel system care: checking for gas leaks before use prevents damage and unsafe operation
• Storage habits: turning off gas at the LP cylinder and storing the cylinder outdoors when disconnected reduces risk and wear

Maintenance checklist that extends grill life

We recommend this routine for a Weber LP grill like the SUMMIT:

• Before each cook: check the grease tray for buildup; remove excess grease
• Before lighting: check for gas leaks (never use a flame)
• Monthly (or more often with heavy use): brush cooking grates; clear burner obstructions
• Seasonally: deep-clean the cookbox and drip area; inspect the fuel hose routing away from heat
• Always: keep combustibles at least 24 inches from the top, bottom, back, and sides while operating

What “wearing out” usually looks like

Symptom	Common cause	What to do next
Uneven flame pattern	Clogged burner ports or obstructions	Clean burners and recheck flame pattern
Burners go out while cooking	Wind, grease, or gas flow issue	Turn valves off, open lid, wait 5 minutes, then relight per manual
Frequent flare-ups	Grease buildup in tray/cookbox	Clean tray and interior more often
Rusted grates/bars	Heat cycles plus moisture	Replace worn cooking grates or Flavorizer bars

Why it matters

A SUMMIT grill can physically last a long time, but performance depends on safe combustion and clean airflow. Regular cleaning and leak checks help you maintain steady heat, reduce flare-ups, and protect key components.

If you need replacement parts for your Weber SUMMIT grill, use the model-based parts list or search by model at Sears PartsDirect.

Last updated: February 2026

A full 20 lb propane (LP) tank typically runs a Weber SUMMIT 425 LP gas grill for about 10 to 20 hours of burner-on cooking time, depending on how many burners you use and how high you run the heat. For the most accurate expectations and safe LP setup, follow the SUMMIT owner's manual.

Typical runtime you can expect

A 20 lb LP tank holds enough fuel for multiple cookouts, but runtime changes a lot with heat setting and burner count.

• High heat, all main burners on: about 10 to 12 hours
• Medium heat, typical grilling: about 18 to 20 hours
• Low and slow (indirect cooking): often 20+ hours
• Wind/cold weather: reduces runtime because the grill works harder
• Frequent lid opening: increases fuel use and extends cook time

Quick estimate table (easy math)

Use this as a practical planning guide for cookouts.

Cooking style	Burner use	Approx. hours per 20 lb tank	Approx. full meals per tank
Searing and fast grilling	High	10 to 12	5 to 8
Everyday grilling	Medium	18 to 20	8 to 10
Indirect, longer cooks	Low to medium	20+	10+

How to stretch a tank (without sacrificing results)

These habits reduce propane use and help your grill heat more consistently.

• Preheat with the lid down; then reduce to the lowest setting that maintains your target temp
• Use only the burners needed for your heat zone (direct vs. indirect)
• Keep cooking grates and burners clean to maintain efficient flame and airflow
• Avoid long warm-ups beyond what you need for stable temperature
• Cook with the lid down as much as possible

Why it matters

Knowing your expected LP runtime helps you avoid running out mid-cook and helps you diagnose performance issues. For example, if the grill suddenly won’t get hot, the manual notes the LP connection’s excess flow safety device can limit gas flow if the tank valve is opened with burner knobs not OFF; the SUMMIT owner's manual covers the correct lighting sequence and reset steps.

If you need to look up parts by model for your Weber grill, search by model number on Sears PartsDirect.

Last updated: February 2026