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When the thermostat calls for heat, the control board signals the valve to open. The valve allows fuel into the burner assembly where it is lit to produce heat.
Specifications
- Part number: 1172822
- Brand: Arcoaire
- Part type: Gas valve assembly
- Ignition: Hot Surface
- Pressure: 1.7" W.C.
- Stages: 2
- Gas type: natural gas or propane, as listed
- Ignition: same type as your furnace
- Pipe size and BTU: same pipe size, rated for your furnace
From the maker's and parts sellers' listings for this number. Compare them with the label on your old part.
How the Gas Valve Works
A gas valve acts as a controlled gateway for fuel inside your furnace. It stays closed when there is no call for heat, which keeps unburned fuel out of your home.
When heating begins, the furnace control system runs checks to ensure safe operation. Once safety devices confirm proper venting and ignition readiness, the valve opens to feed the burners.
Understanding the 1172822 Specifications
The 1172822 gas valve has specific technical ratings that must match your furnace requirements.
Matching each rating prevents operating issues and dangerous fuel pressure imbalances.
- Ignition: Hot Surface
- Pressure: 1.7" W.C.
- Stages: 2
How to Confirm a Match
Before choosing a replacement, inspect the physical label on your current component. Do not rely on furnace brand alone, as equipment designs vary across models.
Compare the ignition design, the pipe size, and the pressure ratings against your old valve to ensure safe operation.
- Gas type: natural gas or propane, as listed
- Ignition: same type as your furnace
- Pipe size and BTU: same pipe size, rated for your furnace
Signs of Valve Failure and Safe Replacement
A valve that fails to open will prevent burners from lighting even if the igniter glows. A valve that sticks open or leaks fuel is a serious hazard that requires immediate attention.
Always take a photo of every wire before removing an old part. Move wires one at a time to the same spots on the new part to avoid wiring errors.
Read your old part
- Turn off the electrical power to the furnace at the breaker panel.
- Locate the gas valve body inside the furnace burner compartment.
- Clean away any surface dust to reveal the printed part numbers.
- Check that the label displays part number 1172822.
- Confirm your system matches the 2 stages and Hot Surface ignition type.
When to call a pro
Gas valve work means opening gas lines and setting gas pressure. We strongly suggest a licensed tech does the install. Hire a licensed HVAC technician for any step you are not sure you can do safely.
Questions
What type of ignition does the 1172822 gas valve use?
This valve is rated for Hot Surface ignition systems. It is designed to work with furnaces that use a hot surface igniter to light the fuel.
What is the pressure rating for this valve?
The 1172822 gas valve lists a pressure rating of 1.7" W.C. A licensed tech must verify and set gas pressure during installation.
How many heating stages does the 1172822 valve support?
This part is designed for 2 stages of heating. It allows two distinct levels of fuel flow for multi-stage furnaces.
What should I do if I smell gas around the furnace?
If you smell gas, do not touch any switch or phone inside. Leave the house immediately and call your gas company from outside.
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