Kenmore 153331840 water heater Parts

For your Kenmore gas water heater model 153331840, the age is determined by decoding the serial number on the rating plate. The serial format varies by manufacturer, so we use the decoding method shown in the 153331840 owner's manual to match the serial number to a manufacture date.

Where to find the serial number

Look for the rating plate label on the water heater jacket (outer tank shell). You will typically see:

• Model number (153331840)
• Serial number
• Gas type (natural gas or LP)
• Capacity and other specifications

How serial number dating usually works

Most water heater serial numbers encode a manufacture year and a week or month. Common patterns include:

• YYWW (year, then week of the year)
• YYMM (year, then month)
• Letter + numbers (letter indicates month, numbers indicate year)

Because Kenmore-branded water heaters were built by different manufacturers over time, the exact pattern depends on who made your specific unit.

Quick decode checklist (what to write down first)

Before decoding, we recommend recording these details from the rating plate:

• Full serial number (exactly as printed)
• Model number: 153331840
• Fuel: natural gas or LP
• Approximate install date (if known)
• Any status light or diagnostic code (if your unit has one)

Why the exact age matters

Knowing the manufacture date helps you plan maintenance and replacement timing. Gas water heaters typically last 8 to 12 years under normal residential use; age also helps you decide when parts like the anode rod or gas control are worth replacing.

Helpful reference table

What you have	What it tells you	What to do next
Serial number only	Approximate manufacture date	Decode using the manual’s format guidance
Serial + install date	Real-world age in service	Use install date for maintenance planning
Serial + symptoms	Whether repair is likely	Check common failure parts and diagnostics

Related troubleshooting help

If you are also seeing a diagnostic light or code, use Kenmore gas water heater error codes to interpret it before replacing parts.

Last updated: February 2026

For a typical 50-gallon gas water heater installation, average labor commonly runs about $400 to $1,000. The final labor price depends on venting and gas-line work, access to the heater, local permit requirements, and whether any plumbing or safety upgrades are needed; review your owner's manual for installation requirements and clearances.

What usually changes the labor price

Labor goes up when the installer has to modify the existing setup or bring it up to current standards.

• Permit and inspection requirements in your area
• Venting changes (draft hood, vent connector, chimney liner issues)
• Gas piping changes (new shutoff valve, sediment trap, resizing)
• Water piping changes (corroded shutoffs, new connectors, rerouting)
• Tight access (attic, crawlspace, small closet)
• Haul-away of the old tank and jobsite cleanup

Typical labor scenarios (labor only)

These ranges are common for a 50-gallon atmospheric-vent gas water heater replacement.

Job type	What it includes	Typical labor range
Straight swap	Disconnect and reconnect to existing gas, vent, and water lines	$400 to $700
Moderate updates	Minor vent or piping changes, new shutoffs/connectors	$700 to $1,200
Complex install	Significant venting or gas-line work, difficult access, multiple upgrades	$1,200+

Parts that can affect install time on Kenmore 153331840

If the heater is being repaired during install or has ignition issues, labor can increase because troubleshooting and safety checks take longer.

• Water heater temperature and pressure relief valve 100108279 (required safety device; may be replaced if leaking or corroded)
• Water heater drain valve 100108778 (often replaced if seized or leaking)
• Water heater pilot assembly 100112330 and water heater thermocouple 100112327 (common no-pilot or pilot-won’t-stay-lit items)

Why it matters

Gas water heater installs are safety-critical. The biggest cost swings usually come from venting and gas-supply corrections, not the tank swap itself. Planning for those items helps avoid surprises and helps keep your Kenmore 153331840 operating safely and efficiently.

Last updated: February 2026

On your Kenmore gas water heater, the model number is printed on the rating plate (data label). For model 153331840, use the full model number exactly as shown on that plate when looking up parts, the Use & Care Guide, or service information in the owner's manual.

Where to find the model number and other key info

The rating plate is one of the labeled components shown in the manual’s “Get to know your water heater” diagram.

Look for a label that typically lists:

• Model number (example: 153331840)
• Serial number (unique to your tank)
• Type of gas (natural gas or propane)
• Capacity (this model family includes 40-gallon versions)

How to “read” the number in a practical way

For parts and troubleshooting, the most important rule is to match the model number character-for-character.

Use this quick checklist:

• Copy the model number exactly (no spaces, no missing digits)
• Write down the serial number too (often needed for service records)
• Confirm gas type before ordering gas components
• Keep a photo of the rating plate for future reference

What to use the model number for (and why it matters)

Using the correct model number prevents ordering the wrong gas control, pilot, or safety parts that may look similar but fit differently.

What you’re doing	What to use from the rating plate	Why it matters
Ordering repair parts	Model number + gas type	Ensures correct fit and safe operation
Looking up diagrams/instructions	Model number	Matches your exact configuration
Troubleshooting ignition/heating issues	Model number + serial number	Helps narrow down the correct system components

Common parts that often require an exact model match

If you’re diagnosing a no-heat or pilot issue, these parts are model-sensitive:

• Water heater pilot assembly 100112330
• Water heater thermocouple 100112327
• American water heaters water heater gas valve and temperature control assembly 100112336

Last updated: February 2026

On the Kenmore 153331840 gas water heater, the most common issue we see is ignition related: the pilot will not stay lit or the burner will not keep running. That often traces back to the pilot/thermocouple circuit, restricted combustion air, or venting problems that disrupt proper combustion.

Quick checks that solve many “no heat” complaints

• Confirm the gas supply is ON and other gas appliances work.
• Make sure the tank is completely full of water before turning gas ON (open a hot faucet until water flows steadily).
• Inspect the air intake area and base-ring filter for lint and dust buildup.
• Look for signs of venting trouble such as sooting, rust flakes near the top, or loose vent connections.
• If you see sooting, turn the gas OFF and correct the cause before using the heater again.

Parts that commonly fix the root cause

If the pilot will not stay lit, these model-matched parts are common repair paths:

Symptom	Likely area	Example part for this model
Pilot lights but goes out	Flame sensing safety circuit	Water heater thermocouple 100112327
Pilot will not light or is weak	Pilot burner and tubing	Water heater pilot assembly 100112330
Burner will not stay on or temperature is erratic	Gas control and temperature control	American water heaters water heater gas valve and temperature control assembly 100112336

Why it matters

Gas water heaters need steady combustion air and proper venting to burn cleanly and carry exhaust safely out of the home. Vent restrictions and sooting are not “normal maintenance”; they signal a combustion problem that should be corrected before continued operation.

Where to find model-specific guidance

For the exact inspection points, cleaning guidance, and troubleshooting steps for your Kenmore 153331840, use the owner's manual.

Last updated: February 2026

Yes. On the Kenmore 153331840 gas water heater, we can replace many service parts (such as the pilot assembly, gas valve/temperature control, anode rod, drain valve, and T&P relief valve) to restore safe operation and extend service life. If the tank is leaking or the unit has been under water, replacement is required.

Parts you can commonly replace on this model

These are typical replaceable components for the Kenmore 153331840, and several are available for this model:

• Pilot and ignition components (no pilot, pilot will not stay lit): water heater pilot assembly 100112330
• Gas control and temperature regulation (no heat, erratic heat): american water heaters water heater gas valve and temperature control assembly 100112336
• Corrosion protection (rusty water, shortened tank life): water heater anode rod 100109434
• Overpressure safety device (dripping discharge pipe, safety concerns): water heater temperature and pressure relief valve 100108279
• Draining and maintenance (won’t drain, leaking drain): water heater drain valve 100108778

Safety first (gas, scalding, and pressure)

Gas water heater repairs can involve fire risk, hot water burns, and pressure hazards. Follow the lighting and shutdown steps in the owner's manual and use these safety rules:

• If you smell gas: do not light anything or touch switches; follow the manual’s gas-safety instructions.
• Turn the gas control knob to OFF and wait the recommended time before relighting.
• Let water cool before opening any drain or water connection.
• Never cap or block a T&P relief valve discharge line.
• If any part of the heater has been under water, replace the water heater.

Quick “symptom to part” guide

Symptom	Common cause	Part to check/replace
Pilot will not stay lit	Weak pilot/thermocouple circuit	Pilot assembly, thermocouple
No hot water	Gas control problem, burner issue	Gas valve/temperature control, burner assembly
Water on floor from relief line	Excess pressure/temperature or bad valve	T&P relief valve
Rusty or metallic-smelling hot water	Depleted anode rod	Anode rod

Why it matters

Replacing the right part can restore safe combustion and temperature control, reduce nuisance shutdowns, and help protect the tank from corrosion. Safety parts like the T&P relief valve are critical because they help prevent dangerous overpressure.

For diagnostic help when the status light is flashing, use Kenmore gas water heater error codes.

Last updated: February 2026