Question about Water Heaters
You most likely have a bad thermocouple. Without the model number I can not provide you witha source for a replacement. However.... before you change the thermocouple try this. Unmount the thermocouple at the gas valve (no gas will escape). Clean the bottom of the thermocouple mounting area inside the case valve as best you can then clean the end of the thermocouple then reconnect it to the gas galve. Try lighting it and as the pilot burns make sure the flame of the pilot is directly ON the thermocouple sensor end. Reposition the thermocouple if necessary. Test again.
If after trying the cleaning procedure it still does not light you have little chouce but to change the thermocouple as part of the troubleshooting process. If it still does not stay lighted after replacing the thermocouple the bad news is the main gas control valve has failed. The good news is... you will have a new thermocouple to work with a new gas control valve if it is replaced.
There is some good reading on this webpage even though it does not display properly:
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Posted on Apr 09, 2011
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Posted on Jan 02, 2017
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