I cant find my serial number on my outdoor viking profesional barbeque i need it to see whats guranteed , and order parts

contact Viking direct and send them a picture.
https://www.allvikingparts.com/Gas_Conversion_Kits_Natural_and_LP_s/372.htm

https://www.google.com/search?q=Viking+53%22+outdoor+propane+BBQ&safe=off&rlz=1C1QJDB_enCA643CA644&sxsrf=ALeKk01DVyFT2Y07cx883YDj8NnWQB0Mwg:1618705782056&source=lnms&tbm=isch&sa=X&ved=2ahUKEwighYr5xIbwAhVCXc0KHX5GDOAQ_AUoAnoECAEQBA&biw=1920&bih=937

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Contact your local Viking dealer. They will be able to tell you where the serial number is located.

http://www.allvikingparts.com/

http://viking.nationalpartscenter.com/?gclid=CLDMkYzyutQCFZA0aQodOFAKZw

Two links above to Viking. Bottom one is to National parts center.

Need a model number for the outdoor unit. The sensor should have a part number tag on the sensor wire.

The control panel face can be ordered from Viking Range unless the unit is very old, then I would suggest partstown.com, You will need the model and serial number from the rating plate on the unit. These parts are usually not very expensive and are really easy to replace.
Hope this helps....GOD BLESS...Randy...

For information about replacement parts, or warranty service call our Customer Service Team at 1-800-752-3085. If we can't answer your call, you can leave a detailed message allowing us to research your inquiry and respond with an answer. Please include a description of your grill (make, model, and number of burners), an order number or how long ago you purchased it, and your zip code so we can determine if there is a store in your area.
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It is usually on the stove at the bottom of the oven door. you might have to remove it to read it properly