Office: Please schedule for replacement of high pressure switch at the end of Januaray, week of the 20th. Please order high pressure switch, screw on type with a brass âTâ. Nordyne M/N: FT48D-024K S/N: FTF130400732 Arrived at the location and met with the tenant and she explained what has happened to the unit. Price to do diagnostics of the system. Turned the system on and the heating is functional. Turned on the cooling and blower came on but the condenser did not. Found a bad fuse that had blown and checked for frayed or shorted wiring but none detected and replaced the fuse. At the condenser found bad contactor and notified the owner and she authorized the repair. Continued with the diagnostics and also found that the high pressure switch is also faulty. This switch will need to be replaced to protect the compressor. Recommend 1. Replacing the high voltage whip due to it being small diameter in reference to the panel hole. 2. Replacing the liquid line filter drier due to