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Air-conditioning installation, dismantling, transfer machines. Air-conditioning maintenance, and freon. Air-conditioning inside and outside cleaning and maintenance. · Home central air conditioning maintenance, installation, add liquid. · Large and medium-sized central air-conditioning design installation and maintenance cleaning and maintenance. We solemnly promise: no matter the distance, workload size, simply call our telephone service, we ensure that within one hour door for you. Air conditioning in the heating mode can not open the machine how to do? If it is in the heating mode, you have to test the filter following areas, 1: System lack of fluoride, if the lack of fluoride and fluoride gave Gree 2: Setting the temperature is too low, 3: 4-way power supply voltage is normal. valves, compressors and other faults, master site needs to do accurate identification. open air of the shell (without dismantling the screw directly with lever) has a switch that on top of the original in the "remote boot" over there to pull the switch to " trial run "side, look at the operation does not? If you can do that is a remote problem, the problem is the machine does not work, it needs a professional technicians on-site to help you on-site inspection and maintenance of