Santa fe 2007 fuel cap release fitted to drivers door does not work.I open via the boot.Any advise

Lots of reasons here.

You left keys in the ignition.
You are running out of fuel
Low battery in key fob.
One of your doors is open. Check them all, including the trunk, to make sure that your doors are properly latched.
Your fuel door isn't closed.
You (or one of your passengers) hasn't fastened a seatbelt.

Or any of the sensors that make those things happen. The only way to diagnose is an auto-electrician with a $5,000 scan tool computer. The reaches all the parts your diagnostic tool can't.

https://www.google.com/search?q=Hyundai+Santa+Fe+2007+is+making+a+constant+beeping+noise

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some cars have a separate control for driver and pass. temp setting. check that one isn't set to cold and one to hot. if ok it can be a stuck flap or bad module.

http://www.carcomplaints.com/Hyundai/Santa_Fe/2007/recalls/

Cable needs to be adjusted

yes this is a warranty item as it relates to the emission purge system ( pressure test for gas tank ). but before you go make sure your gas cap is tight (3 clicks) sometimes after getting fuel a loose gas cap will trip the purge solenoid valve to think there is a leak.

how to change the fuel filter on 2007 hyundai santa fe

the wires in the rubber boot or the push in connection ,its connects the door to the car body

I have a 2007 Hyudai Santa Fe and had the same problem this morning. I wasn't sure what to do and couldn't find any solutions mentioning this, so I thought I would.

My tank wasn't frozen or anything and the cable tension seemed fine. If you go to the trunk there should be an access panel on the left side wall behind the tank (has a picture of a fuel pump on it), open this up and you will see an emergency fuel tank pull cord which will open the tank. Once I opened mine, I found that the little cord that holds the gas cap on was jammed in the door hinge. I tested it a few times with the "normal" release on the driver side door and it works fine now.

The hatch is probably "jammed".
Has the hatch opened by itself while you are driving? That is a symptom....
Using a second person/helper, press the "open" button while you pull hard to pop it open.
If it opens, then the lock mechanism needs adjusting and tightening. There are two bolts that hold the catch hook. Once you adjust the catch, be sure to "open" the latch before you close the hatch. (rhyme not on purpose)...

Hope this helps!

There should be an adjustment point on this cable at either end. Adjust to make the cable shorter and this should solve your problem.