That may be what it is/does, but it's not on my 70 and it's not on a 69, either. At least if this is what you're talking about (item at extreme left on heater/AC box). These are made of metal: http://www.bos-engel.com/imperial/vreg.jpg Maybe it is used on the Autotemp 2 systems used from 71 up. Pete in PA From: "Dave Grove" <dave@xxxxxxxxxxxxxxxxxxx> Subject: Re: IML: Identify this part Date: Thu, 29 Jul 2004 14:57:10 -0400 It's a temp sensor that keeps the A/C clutch from engaging below a certain temperature. It is found mounted on the front of your heater/A/C box (under the hood). Regards, DaveG. ----- Original Message ----- From: "Peter Engel" <peter.engel@xxxxxxxxxxx> To: <mailing-list@xxxxxxxxxxxxxxxx> Sent: Thursday, July 29, 2004 2:50 PM Subject: IML: Identify this part > I've owned a 70 Imperial for 20 years and never seen this part on my > car. Anyone know what it is? > > The part number doesn't seem to be in the 70/71 MPC > > ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&rd=1&item=2485654577 > > Pete in PA