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Which sentence is correct?

I have not ran the air conditioning this year.

or

I have not run the air conditioning this year.
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Comments  
run
is required
the present perfect requires the infinitive, not the past tense
I'm not good at the names of things, but don't you mean it requires the past participal, rather than the inifinite?

To sing.

Yesterday I sang.

I haven't sung that particular song in hears. Past participal - sung - not the infinitive.
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Grammar Geek
I haven't sung that particular song in hears.

Funny typo
Argh. Years! Years!! (And I meant infinitive, not infinite. Some days it doesn't pay to go near the keyboard, does it?) Although I do wonder how you got that picture of me and the pig!
Grammar GeekI'm not good at the names of things, but don't you mean it requires the past participal, rather than the inifinite?
Stupid error on my side, guess I was ready to take my nap: of course it's the past participle which is required in the present perfect.

Funny site: can't edit my erroneous posting any more.

Thanks for pointing that up.
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Heck, apparently I can't even spell participle. But you're so often on the ball with these things that I found myself questioning my own thoughts. I guess I should have had confidence in my grammar and questioned my typing!
I have not [run / *ran] the air conditioning this year.

Aside from verbs which do not change at all (cut, quit, ...), the only verbs which have the same form for infinitive and past participle are run (run, ran, run) and come (come, came, come) and their compounds (rerun, become, ...).

CJ
I have not ran the air conditioning this year
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