Master Contactor Stuck?

How to keep the Cessna 170 flying and airworthy.

Moderators: GAHorn, Karl Towle, Bruce Fenstermacher

Post Reply
pojawis
Posts: 111
Joined: Fri Aug 01, 2003 10:51 pm

Master Contactor Stuck?

Post by pojawis »

Looking for opinions on diagnosing what is believed to be an electrical issue.

When placing the master switch to the off position, the current remains on for 10 - 30 seconds. After this it shuts down and all remains off. Would this be a switch problem or a contactor (master solenoid) problem?
Top
ghostflyer
Posts: 1423
Joined: Mon Apr 21, 2008 3:06 am

Re: Master Contactor Stuck?

Post by ghostflyer »

It could be both , so disconnect the switch [battery isolated first] and connect up a multi meter and check continuity as the switch is being operated . If switch is okay then it's the contactor .nothing lasts forever .
Top
pojawis
Posts: 111
Joined: Fri Aug 01, 2003 10:51 pm

Re: Master Contactor Stuck?

Post by pojawis »

Thanks. Will do and post results.
Top
Post Reply

Return to “The Hangar”

Cessna® is a registered trademark of Textron Aviation, Inc. The International Cessna® 170 Association is an independent owners/operators association dedicated to C170 aircraft and early O-300-powered C172s. We are not affiliated with Cessna® or Textron Aviation, Inc. in any way.