On Sat, 11 Jun 2016 13:29:44 -0700 (PDT), dsi1 >
wrote:

>On Saturday, June 11, 2016 at 9:06:28 AM UTC-10, Ed Pawlowski wrote:
>> On 6/11/2016 10:03 AM, Gary wrote:
>> > Brooklyn1 wrote:
>> >>
>> >> Agreed, best to call for service early, before they are backlogged. I
>> >> call mid April and they make an appointment for mid May because that's
>> >> when it's warm enough here for A/C to operate. If I waited to call
>> >> when it's already hot here they may not get to me until the end of
>> >> June or even into July.
>> >
>> > An A/C guy once told me to turn on the A/C for about 5-10 minutes once
>> > a month even during the winter months...just to keep all parts
>> > working.
>> >
>>
>> I've heard that too from an engineer that designed HVAC for one of the
>> major manufacturers. The AC in your car get used when you turn on the
>> defroster so that keeps things lubricated.
>
>The reason the AC gets turned on in the modern car defroster systems is to remove
>the moisture from the air blowing on the cold glass surfaces. This greatly improves
>performance. Mostly, that's how dehumidifiers work. Air is moved from a refrigeration
>section and then through a heating section.

Also helps to keep moving parts lubricated, and moving the coolant
helps keep the rubber hoses lubed too.