2 minutes is a long time to wait. I have not tried it as I always use the button anyway, but might a shorter (say 30 second) delay be more likely to be endured. If you try a surplus Thermal Time Delay Relay,
<http://www.surplussales.com/Relays/RETimeD-5.html>
make sure to check the # of base pins and Normally Open vs Closed status and naturally, the voltage....

Al Heath


        
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