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If you are holding an old part with this number, checking the markings and physical dimensions helps you find the correct replacement. Fuel lines require exact fits to work safely.
Specifications
- Part number: 00-420560-00001
- Brand: Vulcan Hart
- Part type: Gas valve
- Height: 1.4 in / 3.56 cm
- Length: 2 in / 5.08 cm
- Width: 2.1 in / 5.33 cm
- 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.
What the Gas Valve Does
A gas valve controls the flow of fuel inside your heating appliance. When the system calls for heat, the valve opens to send gas to the burners so they can ignite.
When the call for heat ends or if a safety switch detects a problem, the gas valve shuts tightly. This stops the flow of gas and keeps the appliance running safely.
Understanding the Part Dimensions
Replacing a gas component requires checking its physical size. Space inside the cabinet can be tight, so the replacement must fit the existing layout.
Part number 00-420560-00001 has the following recorded dimensions:
- Height: 1.4 in / 3.56 cm
- Length: 2 in / 5.08 cm
- Width: 2.1 in / 5.33 cm
How to Confirm a Replacement Matches
Always match the exact part number from your old valve label before choosing a new part. Never rely on visual appearance alone.
When reviewing options for a replacement gas valve, check these essential matching points:
- 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 your burners from lighting even if the igniter or pilot is working. A valve that sticks or fails to seal properly can cause fuel odors or safety shutdowns.
Working on fuel piping carries fire and explosion risks. Take a photo of every wire before removing any connections, and move wires one at a time to the same spots on the new part. Because gas lines must be disconnected and gas pressure must be set correctly, hire a licensed professional for the installation.
Read your old part
- Turn off electrical power and shut off the main gas supply to the unit.
- Locate the label or stamped markings on your existing valve body.
- Read the part number printed on the label and verify it shows 00-420560-00001.
- Measure the height, length, and width of your old component to verify they match the specs.
- Check that your fuel type, pipe size, and ignition type match the requirements of your heating unit.
When to call a pro
Gas valve work means opening gas lines and setting gas pressure. If you do not have the proper tools to test for leaks and verify manifold pressure, stop right away. Hire a licensed HVAC technician for any step you are not sure you can do safely.
Questions
What should I do if I smell gas around the unit?
Leave the house immediately. Do not touch any electrical switch or use phones inside the building. Call your gas company from outside once you are safe.
Can I replace a gas valve myself?
Gas valve work involves opening fuel lines and setting gas pressure. Because of the safety risks involved, a licensed technician should perform the installation.
What properties must match when replacing a gas valve?
You must confirm the gas type, such as natural gas or propane, as listed. You must also match the ignition type, the pipe size, and the BTU rating of your furnace.
What are the dimensions of part 00-420560-00001?
This part measures 1.4 in / 3.56 cm in height, 2 in / 5.08 cm in length, and 2.1 in / 5.33 cm in width.
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Brand names and part numbers identify the part and show fit. HVAC Fitter is not affiliated with, authorized by, or endorsed by any equipment maker. If you are not sure a repair is safe for you, call a licensed HVAC technician.