Hi to all im new to the foerum however it is a source for any tech.I have worked on residental split system/heat pumps for 15years and now i am dissaled and spen much time here at home im reaching to all in order to learn how to troubleshoot/repair walkin coolers and walk in freezers if some could post a link where i could order a dvd showing visually how ao deal with this light commercial freezer and coolers it would be appreciated or maybe someone on this foerum have a dvd or dvds i would gladly purchase them from you. thanks in advance.