2009 Mazda5 - Remote key fobs only work when it's cold!

My key fobs and driver door lock only work in cold or cooler weather. Real brain teaser. I have no idea why. I actually have to go old school all summer to unlock and lock the driver door with the key. The switches on all other doors work but if I manually lock the driver door, there others will lock with the and vice versa. Warm weather only. In cooler and cold weather fobs work fine. It's a real brain crazy tease. Anyone? Thanks

BTW it's a 09 Mazda5
 
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