My ventfree fireplace is not working. I need a gas valve Vs8421D 8026. Any suggestions

Try this link and number

https://customer.honeywell.com/en-US...s/default.aspx

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Are you sure it's the gas valve? Your model appears obsolete, but I am sure a rep can assist you with troubleshooting and proper replacement. There is always eBay.

Check eBay, some or similar on there

Or try this https://customer.honeywell.com/request.cfm?form=69-1219
What happens when you try to light it, does it have a pilot?