mitsubishi split system

10-02-2011, 01:26 PM	#1
gherlain Newbie   Join Date: Oct 2011 Posts: 1	mitsubishi split system we installed a mitsubishi split system mxz-4b36na. the a/c worked great in the summer but now we turned on the heater and it is blowing cold air instead of warm. we turned on the 4 inside units and it is the same problem. it is not blowing warm air. what could be the problem?

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10-02-2011, 02:00 PM	#2
hvactech126 Professional   Join Date: Nov 2010 Location: NE Indiana Posts: 2,003 Blog Entries: 1	mitsubishi split system call mitsubishi. They do not operate as normal hvac equipment. Also download your manual from mehvac.com it will give some troubleshooting help. __________________ IT IS WHAT IT IS To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

10-02-2011, 09:00 PM	#3
Tator1076 HVAC Tech/ Browns Fan   Join Date: Dec 2009 Location: Dayton, ohio Posts: 539	mitsubishi split system Need make sure its hook up right and the reversing valve is shifting. I work on that kind unit all the time and did find reversing valves are bad. Matter fact the supply house were we get parts from say that recall had been sent out for those units.