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Here' s how respond the hevac on bench test .

Hi all.. i have bench tested all the recirculation system and it works, both motors goes up and down pushing the recirculation button .. I didn't reach the dead points to avoid the gear to break . Ones fitted it doesn't work (rh motor only) I've noticed a couple of interesting things: 1)...

Latest informations.. I finally got (at least I think I got) the solution or theoretically the solution. it's not the motor , it's the hevac module, here's way theory may win: motor are thermal controlled, as it's written one's case and even more because inside the module there is a circuit...

do you have any idea how the ecu finds the travels end points? my question is because I I would like to understand how does it work. As there is no wire for any signal how the hell does it find the end of travel? being the voltage constant , does the Ecu sense an increment of current as end...

ok thank you for the explanation, but still have to solve the current flow from Hevac module .. it comes only +/- and not viceversa. Curiosity, why should never travel all the way off the case? to avoid gears to worn out or some other reason? Thank a lot

No marks at all... I found that current flows +/- and not vice versa .. it opens but doesn't close the flap.. so I believe I must focus on the hevac module. From RR literature the recirculation push button feeds current to the motor until it reaches the full open position , once depressed it...

Great I'll check for the marks tomorrow.. thanks

Hi all, P38 1999 4.6 , i have changed all Hevac motors and the right Recirculation motor is driving me crazy. It works , tested with 9v battery goes fully open and fully close with nice and smooth , once it's hooked at its harness it seems dead. So I got the old one with no gear (only the motor...

From Rome . hope you all are doing well.. ciao