Williams 1403821 User Manual

Williams 1403821

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OWNER’S MANUAL

INSTALLATION INSTRUCTION

DIRECT-VENT

WALL FURNACE

MODELS:

1403822; 1413822; 1433822; 1453822;

2203822; 2213822; 2233822; 2253822;

3003822; 3013822; 3033822; 3053822

NATURAL GAS ONLY

MODELS:

1403821; 1413821; 1433821; 1453821;

2203821; 2213821; 2233821; 2253821;

3003821; 3013821; 3033821; 3053821

PROPANE GAS ONLY

SAVE THIS MANUAL FOR FUTURE REFERENCE.

14,000 BTU/hr. 22,000 & 30,000 BTU/hr.

READ THIS OWNER’S MANUAL CAREFULLY BEFORE YOU

INSTALL YOUR NEW WILLIAMS WALL FURNACE.

– Do not store or use gasoline or other flammable

vapors and liquids in the vicinity of this or any

other appliance.

– WHAT TO DO IF YOU SMELL GAS:

• Open all windows

• Do not try to light any appliance.

• Do not touch any electrical switch.

• Do not use any phone or cell phone in your

building.

• Extinguish any open flame.

• Immediately call your gas supplier from a

neighbor's phone. Follow the gas supplier's

instructions.

• If you cannot reach your gas supplier, call the

fire department.

– Installation and service must be performed by a

qualified installer, service agency or the gas

supplier.

WARNING: If the information in these

instructions is not followed exactly, a fire or

explosion may result causing property damage,

personal injury or loss of life.

250 WEST LAUREL STREET, COLTON, CA 92324 U.S.A.

WARNING: Improper installation, adjustment, alteration,

service or maintenance can cause injury or property damage.

Refer to this manual for proper installation. For assistance or

for additional information consult a qualified installer, service

agency or the gas supplier.

WARNING: This product can expose you to chemicals

including epichiorohydrin which is known to the State of

California to cause cancer and birth defects and/or other

reproductive harm. For more information go to

www.p65warnings.ca.gov.

Questions and Answers:

B
Breanna StoneAug 23, 2025
What to do if my Williams 1403821 Furnace won't shut off?
- L
  Laurie ByrdAug 23, 2025
  If your furnace continues to run even after reaching the set temperature, there are several potential causes. First, the thermostat wiring may be defective, such as lead wires shorted together by a nail or staple. You can check this by removing the thermostat leads from the valve terminals. Also, the thermostat's location could be the issue. If it's on an outside wall or exposed to cold air, relocate it. The thermostat itself might be defective, so check its calibration or consider replacing it. Finally, dirt under the valve seat or a stuck-open valve can prevent the furnace from shutting off, in which case the valve should be replaced.
D
Dylan JohnstonAug 25, 2025
Why Williams 1403821 pilot will not stay lit?
- K
  Kelsey AndrewsAug 25, 2025
  If the pilot light on your Williams Furnace won't stay lit after you've followed the lighting instructions, there are several potential causes. First, the generator may not be producing enough millivolts because the pilot flame isn't properly hitting the generator, or the generator isn't fully inserted. Also, ensure the pilot lighting door is tightly closed. The generator itself could be defective, or the connections at the gas valve might be loose or dirty. Another possibility is a grounded thermostat lead wire. Finally, the gas valve itself could be defective and require replacement after the other possibilities have been eliminated.
T
Timothy EdwardsAug 27, 2025
How to fix a pilot outage problem in Williams Furnace?
- G
  Gary ParkerAug 27, 2025
  If you're experiencing pilot outages, first adjust the pilot flame, as it may be too low or blowing. Inspect the vent tube and air inlet tube. Ensure the pilot lighting door is closed properly. Also, the pilot orifice or aerating hole may be plugged; check for obstructions like spiders or webs. Additionally, check the control and pilot observation doors for broken or missing gaskets; clean and replace them if necessary.
M
Michael BallAug 27, 2025
What to do if the blower on my Williams Furnace doesn't run?
- M
  Michael WarrenAug 28, 2025
  If the blower isn't running, first ensure the fan switch is properly set to the desired fan speed. Also, check the bearings and add oil as instructed in the blower instructions.
V
Vanessa RichardsonAug 29, 2025
What to do if Williams 1403821 burner comes on then goes off?
- B
  Bryan BrewerAug 29, 2025
  If your Williams Furnace burner comes on but then shuts off for no apparent reason, check the vent tube and the air inlet tube to ensure they are properly installed according to the installation instructions. Make sure the joints are tight and both tubes are correctly in place, using only the provided tubes and not extending them beyond their original length. The furnace might also be overrated, so check for high pressure at the valve and consult the rating plate for the specified minimum/maximum supply pressure. Also, check the burner orifice.
C
Cheryl CostaAug 31, 2025
Why my Williams 1403821 operates but turns off before reaching room temperature?
- A
  amyjohnsonAug 31, 2025
  If your Williams Furnace operates but turns off before the room reaches the set temperature, the thermostat location could be the issue. Ensure it's not in the path of warm air from the furnace, near a lamp, or above a TV or stereo. Alternatively, the thermostat itself may be defective, so check its calibration or consider replacing it.
A
Angel RodriguezSep 2, 2025
Why Williams 1403821 Furnace is not producing enough heat?
- T
  Terry JuarezSep 2, 2025
  If your Williams Furnace isn't producing enough heat, it might be too small for the space you're trying to heat, so check the heat calculations. Also, the furnace might not be burning at its full rate. Check for low gas pressure and inspect the burner orifice.
P
powellleslieSep 3, 2025
What to do if Williams Furnace blower does not run?
- T
  Thomas RamirezSep 3, 2025
  If the blower in your Williams Furnace isn't running, first make sure the fan switch is properly set to the desired fan speed. Also, check the bearings and add oil as outlined in the blower instructions.
A
Alexander BatesSep 5, 2025
Why is my Williams Furnace pilot lit but no gas to the main burner?
- W
  whitney10Sep 5, 2025
  If the pilot light is on but the main burner isn't igniting, first ensure the gas valve is turned to the 'ON' position and the thermostat is set to call for heat. A plugged burner orifice can also prevent gas flow, so check, clean, or replace it as needed. Inspect the thermostat wires for proper connection or breaks, and test the thermostat by jumping across the terminals on the valve. Also, the pilot generator may not be generating sufficient millivolts to open the valve, check the pilot flame and clean connections at the valve. If these steps don't resolve the issue, the valve itself may be defective and require replacement.
J
James MirandaSep 7, 2025
Why is my Williams Furnace not producing enough heat?
- H
  holmestimothySep 7, 2025
  If your furnace isn't producing enough heat, it might be too small for the space you're trying to heat; check the heat calculations to confirm. Also, the furnace may not be burning at its full rate. Check for low gas pressure and inspect the burner orifice for any obstructions.

Williams 1403821 Specifications

General

Brand	Williams
Model	1403821
Category	Furnace
Language	English

Summary

Installation

Locating Wall Furnace

Finding the correct placement for the furnace on an outside wall.

Interior Clearances

Ensuring required space around the furnace for safety and operation.

Wall Opening and Vent Preparation

Creating wall openings for vent, gas, and electrical supply.

Furnace and Cabinet Mounting

Installing spacer plate, furnace, vent cap, and cabinet.

Thermostat Installation

Installing the thermostat according to wall mounting guidelines.

Gas Supply and Piping

Connecting gas lines, checking orifices, and leak testing.

Operating Your Furnace

Lighting the Pilot

Step-by-step guide for igniting the pilot light.

Operating Instructions

Sequence of operations for the furnace.

To Turn Off Gas To Appliance

Procedure for shutting off gas supply to the unit.

Start-Up Procedure

Initial steps for starting the furnace after installation.

Gas Pressure and Input Checks

Verifying gas pressure and input rate against specifications.

How to Care for Your Furnace

Abnormal Appearance

Identifying and understanding unusual flame behavior.

Annual Upkeep and Cleaning

Recommended maintenance tasks for optimal performance.

Pilot Burner Adjustment

Adjusting the pilot flame for proper operation.

Blower Accessory 2302 and 2303

Mounting and Field Wiring

Instructions for installing and wiring the blower accessory.

Blower Operation Modes

Explains automatic and continuous fan operation.

Replacement Parts List

Blower Accessory Parts

Parts list for Blower Accessory 2302 and 2303.

14038 Series Furnace Parts

Replacement parts for 14038 series furnaces.

22038/30038 Series Furnace Parts

Replacement parts for 22038, 30038 series furnaces.

Burner and Valve Components

Replacement parts for burners, gas valves, and electrodes.

Hints and Information

Service Hints

General advice for furnace service and maintenance.

Gas Leak Emergency Procedure

Steps to take if you smell gas.

Ordering Replacement Parts

Information required when ordering new parts.

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