Whirlwind FH-778 Air Conditioner "necesary" Questions

...replaced batteries. We have 5 Conia aircons and the remotes only work on 1 unit Conia CA9001 it is necesary to work all the unit in same mode ,cool or heat ,or something ...

GE zoneline made in 2010 is not heating in electric heat or heat pump heat...any ideas? it necesary to wait a few minute and after a time it run working

while its in heating mode why? I'm freezing during these winter storms help at first see i think is necesary to complete your refrigerantor your inverter have electronic problem

...The instructions don't say a word about this other than you should do it every two weeks. it is necesary to clean the filters about one time per month ,with watter and soap,but if in your area is ...

...the thermostat have 2 connection(1 normal open connection and 1 is normal open connection),and it necesary to put your conection on open