Water heater tank beeping

[HiSpec]

Recently my water heater tank is beeping. I don't see any leak around the tank and the water temperature is normal. I tried to Google for a troubleshooting guide for my water heater tank. But no luck. The model is Bradford White MI403S6ENH12.

Is any Beyonder a plumber? Or can anyone recommend a trustworthy and reliable plumber for an assessment?

Cheers!

[revelations]

Youll need to look at the LED on the heater knob - assuming you have one. It will show a flashing pattern that will tell you what to do:

http://www.bradfordwhite.com/sites/default/files/product_literature/44943-D.pdf

[HiSpec]

That's the thing... Mine is the retro-dial Robertshaw not the Honeywell with LED.

[ExtraSlow]

is it beeping out the code then? Or is there an LED somewhere, maybe behind a cover? If it's got enough smarts to beep when there's a fault, it has some method of telling you what fault it detected.

[HiSpec]

I wish it's beeping out a code. It's beeping once every 15 seconds.