Have a hitachi finishing nailer im65 batteries not charging. every time i put battery in charge it clicks and the light goes off and dosen't charge battery been like this for a few months now?

Test the volts and amps of the battery after charging, then try to shoot nails then test again after the blinking orange light. Battery is failing, they only have a certain number of recharge cycles and are also governed by age degradation.

https://www.google.com/search?q=hitachi+nailer+battery+problems+and+solutions

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how old are the batteries.
how old is the charger.
if one or the other is too old or defective,
the bad part will "fail safe"the system.
shut down so it doesnt explode or burn
if it does it with multiple batteries its probably the charger.be sure to check your electrical source too.
bad outlet??
be careful these batts can be dangerous.
,

Continuous flashing indicates low battery charge or poor battery connection. If lights flash 4 or 5 times indicates possible control module fault.

generally when charging the light will be red until a full charge is indicated and the light will turn green. if while trying to charge the light remains green I would try reinserting the battery or charging unit. If still the same you might have a problem with either.

when pressed down the main switch is activated, so switch could be faulty or connections loose

check your battery with a volt meter, also your charger may be bad

I know a lot of Dewalt nailers will not shoot properly once the battery is starting to get a little worn/has a lot of charging cycles on it. Their picky about having fresh batterys. How old is the nailer/batterys?

Start with the basics:
First check that the butane (or whatever gas is used) canister is full. If empty, put in a new one.

Second check to make sure your battery is fully charged to be able to fire the spark to work the nail gun. If not get the battery charged and/or replaced as needed.

Third make sure all of the safeties are working properly and that you have them engaged to the piece of wood you are nailing when you try the trigger.

If beyond that it does not work it could be a bad trigger, a bad safety switch, or even a bad connection from the battery to the device.

If the battery is flashing red, the battery is not charged or on a minimal charge.
Have you attempted to recharge it and does it still give you this symptom?
K

Does the fan run and the light blink ont he nailer? I have one that I just bought. I put in the wrong type of nails and got one stuck. I had to take the front apart to clear it and now the damm thing wont fire. The green light blinks and the gas cartridge is basically full, even the fan does run after I release the push lever, but no fire???

I wonder if yours is the same as mine did fire for a couple nails first just fine then got jammed...

I will try to charge the battery more.... MAybe like yours it needs a strong charge for the spark...
Russ