dave-in-nj:
be careful with turning an AC on and off.once the compressor is off, the gasses have to equalize.
trying to turn it on with high gas pressure will draw excessive current.
a/c cannot be cycled more than few times per hour. They are not able to obtain any sort of precision temperature control.
one of theses days I am going to post engineering notes on HVAC temperature control.
Thanks for the information Dave. I will take care. I will cycle 1 time once 24hours. What do you think about that situation. I have an air conditioner that doesn't have a timer. I need to power it on at 6am and keep it working until 8am everyday. My bedroom wall is east positioned. So, sun begins heating up the wall at 6am. When it is 8am my bedroom is too hot.
Should I buy a SSR relay instead using an arduino one?