Kenmore 153332421 water heater Parts

To read your Kenmore gas water heater model number, find the rating plate (data plate) on the tank and copy the MODEL NO. exactly as printed. For this unit, the model number format looks like 153.332421; use that full number when ordering parts or checking specs in the 153.332421 owner's manual.

On this Kenmore water heater, the model number is listed on the rating plate (often called the data plate). The manual’s “Get to know your water heater” diagram identifies the rating plate as a labeled component.

• Look for a sticker or metal plate on the tank jacket.
• Find the line labeled Model No. (or MODEL NUMBER).
• Write it down exactly, including dots and all digits.
• Record the serial number too; it helps identify production details.
• Note the gas type (Natural or Propane) shown on the plate.

Many numbers on the rating plate are technical specs. When you are identifying the unit, the model number is the key item.

Kenmore water heater parts are model-specific. Using the exact model number helps match critical components like the gas control valve/thermostat, pilot assembly, and thermocouple so your heater lights, heats, and vents correctly.

Last updated: January 2026

A typical 50-gallon gas water heater averages about $900 to $2,500 installed in the U.S., depending on brand, efficiency, venting changes, and local labor rates. For Kenmore model 153332421, confirm gas supply and venting requirements in the Kenmore 153332421 owner's manual before budgeting for installation work.

• Type of venting: standard atmospheric vent vs. power vent (power vent usually costs more)
• Installation complexity: moving the heater, resizing gas piping, or updating venting
• Local code items: expansion tank, shutoff valves, drip leg, seismic strapping (where required)
• Efficiency level: higher efficiency models typically cost more up front
• Disposal and haul-away: old tank removal fees vary by area

Your Kenmore 153332421 manual emphasizes proper gas supply sizing and following the National Fuel Gas Code (ANSI Z223.1/NFPA 54) for venting and combustion air. These items often affect install cost:

• Gas pipe sizing based on BTU input and total pipe length
• Adequate combustion air and ventilation (avoid corrosive atmospheres)
• Correct vent draft and draft hood setup
• Closed plumbing systems that benefit from an expansion tank

A “cheap” heater can become expensive if the installer has to correct gas pressure, resize piping, or rebuild venting. Planning around gas supply and venting requirements helps prevent delays and surprise charges.

Last updated: January 2026

On Kenmore water heater model 153332421, the first two digits of the serial number indicate the year it was manufactured (for example, a serial number starting with 12 was made in 2012). Some serial numbers may start with a single letter before those two digits.

• Find the rating plate label on the water heater (commonly on the side of the tank).
• Write down the full serial number exactly as shown.
• Ignore a leading letter if present.
• Use the first two numbers as the manufacture year.
• Use the remaining characters for factory tracking (they do not change the year).

Knowing the manufacture year helps us match the right Kenmore parts (like a pilot assembly, thermocouple, or gas control valve) and decide whether maintenance items such as the anode rod are due.

Your label location and formatting details are shown in the 153332421 owner’s manual.

Last updated: January 2026

Yes, on the Kenmore 153332421 gas water heater the thermostat is built into the gas control valve/thermostat assembly, so you replace the entire gas control valve/thermostat rather than a separate thermostat by itself. Follow the safety and removal steps in the owner's manual.

On many gas water heaters, the temperature control (thermostat) is integrated with the gas valve. That means one part handles both:

• Gas flow control to the pilot and main burner
• Temperature setting (control knob)
• Safety shutoff logic (ECO/temperature limiting system)
• Wiring connections to safety devices (such as a thermal switch)

For this model, that integrated part is the american water heaters water heater gas valve and temperature control assembly 100112336.

Replace the gas control valve/thermostat assembly when you see symptoms like:

• Pilot will not stay lit after proper lighting steps
• Burner will not come on even though the pilot is lit
• Temperature control is erratic or will not adjust
• Status light indicates an over-temperature condition and the heater shuts down
• You find a stuck-open pilot valve condition (pilot flame present even with the knob set to OFF)

We recommend using the manual’s procedure because it includes the correct shutoff, draining, and reconnection sequence.

On a gas water heater, the thermostat is a safety-critical control. Replacing the correct integrated assembly helps restore reliable temperature control and proper burner operation while keeping built-in safety systems working as designed.

Last updated: January 2026

A Kenmore gas water heater like model 153332421 typically lasts 8 to 12 years. Regular maintenance can push it toward the high end, especially keeping combustion air clear and staying on schedule for anode rod and T&P relief valve checks listed in the 153332421 owner's manual.

• Anode rod condition: replacing a depleted anode rod extends tank life.
• Water quality: high conductivity and softened water can wear the anode faster.
• Sediment buildup: reduces efficiency and can overheat the tank bottom.
• Ventilation and combustion air: restricted air intake can cause poor burner performance.
• Leaks and corrosion: small plumbing leaks can accelerate rust around fittings.

The manual calls out specific inspection intervals that directly impact tank life.

• Rust-colored water at the hot tap
• Moisture or corrosion at the tank bottom
• Rumbling or popping sounds during heating
• Pilot problems that keep returning after cleaning and adjustment
• Water temperature swings even after thermostat setting checks

If the tank is not leaking, restoring reliable ignition and stable flame often improves day-to-day operation.

• Anode rod 100109624 (corrosion protection)
• Water heater thermocouple 100112327 (keeps the gas valve open when the pilot is lit)
• Water heater pilot assembly 100112330 (pilot flame and ignition reliability)

Once a tank starts leaking, replacement is the practical fix. Staying ahead of anode rod wear and doing the yearly T&P relief valve test helps you get the full expected 8 to 12 years from a Kenmore gas water heater.

Last updated: January 2026

The most common gas water heater problem is the pilot going out or not staying lit, which stops heating and often traces back to the pilot system (thermocouple, burner, or gas control). On Kenmore model 153332421, restricted combustion air and venting issues can also cause poor recovery and unsafe operation (sooting).

• Pilot will not light or won’t stay lit
• No hot water or slow hot water recovery
• Sooting around the burner area or draft hood
• Condensation that looks like a leak during cold months
• Dripping from the temperature and pressure relief valve

1. Confirm combustion air is not blocked: The manual warns not to obstruct the air intake (for example with an insulation blanket). See the 153332421 owner’s manual.
2. Inspect venting at least yearly: Look for blockage, deterioration, loose connections, or rust flakes; sooting is not normal and indicates a combustion problem that must be corrected before further use.
3. Rule out “false leaks” from condensation: Condensation can drip down the flue and extinguish the pilot; after the tank warms for about 1 to 2 hours, it typically disappears.

If your checks point to the pilot system, these are the most common service parts for this model:

Pilot and combustion-air problems do more than reduce hot water; they can lead to sooting and improper venting, which the manual treats as a serious safety condition. Fixing the root cause protects performance, efficiency, and safe operation.

Last updated: January 2026

A Kenmore gas water heater like model 153332421 is built around the tank plus a gas burner and safety controls that light, regulate, and vent the flame. Key service parts include the gas control valve/thermostat, pilot assembly, burner components, drain valve, anode rod, and the T&P relief valve (see the 153332421 owner's manual).

• Tank (stores heated water)
• Gas control valve/thermostat (regulates gas flow and water temperature)
• Pilot and ignition system (lights the burner)
• Burner assembly and burner head (creates the main flame)
• Draft hood and venting (moves combustion gases safely out)
• Air intake and flame-arrestor/base-ring filter (supports safe combustion airflow)
• Drain valve (used for draining and flushing)
• Anode rod (helps protect the tank from corrosion)
• Temperature and pressure (T&P) relief valve (safety pressure relief)

The parts list for this model calls out these frequently serviced items:

Knowing the major parts helps you troubleshoot symptoms faster (no hot water, pilot won’t stay lit, leaks, or poor recovery) and order the correct replacement by matching the model number and the exact part description.

• Use the model and serial number from the rating plate
• Confirm your gas type (natural gas vs propane)
• Compare the part description to the parts list in the manual

Last updated: January 2026

Yes. On the Kenmore 153332421 gas water heater, we replace many service parts (pilot components, thermocouple, burner parts, gas valve, drain valve, and gaskets) to restore reliable ignition, stable water temperature, and safe operation. Always shut off gas and water, and follow the Kenmore 153332421 owner's manual.

These are typical, serviceable items that often solve “no hot water,” “pilot won’t stay lit,” or “leaking” symptoms:

• Pilot and ignition components (pilot assembly, wiring connections)
• Thermocouple or thermopile style flame-sensing parts
• Gas valve and temperature control components
• Burner and combustion air intake parts (when dirty or restricted)
• Drain valve and related fittings
• Seals and gaskets on access doors

• Turn the gas control knob to OFF and wait before relighting (many controls require a cool-down period)
• Shut off the cold water supply to the heater
• Let water cool if you will drain the tank
• Keep combustion air openings clear; do not block the base area
• Never apply heat to the heater’s water fittings; some contain nonmetallic parts

Replacing the right part can extend the life of a gas water heater and prevent repeat shutdowns. For example, restricted combustion air or a weak pilot flame can cause nuisance outages, while a small drain valve leak can look like a tank leak.

For diagnostic flash codes and what they mean, use Kenmore gas water heater error codes.

Last updated: January 2026