The switch inside the door is sticking- a common problem. This may clean the dirt etc and allow the door or close and the sensor to be happy.

First try spraying WD40 into the door cavity behind the latch.

Try slamming the doors one at a time to check which one is the problem until the light goes out. The reason your is going out after 20 minutes is because the timer to save the battery, and when you push the alarm on the key chain it beeps is because the sensor switch senses the door is open, and probably is just not closed tightly.

I have found my 96 XLT door ajar light on to, I go back and slam the doors, and I mean slam, when I first got it I was real easy with closing the doors as to be nice to it, but my 96 doesn't work that way, the senser switch is probably dirty, worn or something so I slam it, and the light goes out. Slomin's Pricing: Monthly Monitoring and Install Costs Likely many of the biggest monitoring companies, Slomoin's promotes a 'free home security system' based on agreeing to a 5 year (60 month) monitoring contract (dependent on having good credit). They offering monitoring services in New York, New Jersey, Conneticut, Pennsylvania, Conneticut, Delaware, Maryland, Virginia, Washington D.C and the State of Georgia. I am a: Homeowner Renter Slomin's is one of the 10 largest home security companies (and still Family owned for over 90 years) in the USA. RESET key to erase the alarm history display. Wait for solid green light on keypad and system ready. Their service is $39.90, and a $199.95 installation cost for the cellular device. Trust predator compact dual stick gamepad gm-1500 driver. Slomin's Pricing: Monthly Monitoring and Install Costs. All pictures and individuals depicting security equipment shown are for illustrative purposes only and images of equipment may differ from the actual product provided.Slomin's is among the largest security companies in the USA. New Residential Customers may choose one promotion to be applied along with Free System. All customers are subject to credit approval. Additional items & features are available at an additional cost. $100 Credit will be applied to the account following alarm installation and the first month of monitoring. Promotion of free doorbell camera increases monitoring rate to $53.95 per month. Five year monitoring agreement required at $37.95 per month for basic system. Free System includes panel & keypad, motion detector, up to 3 door contacts, window decals, lawn sign, communication device, & battery backup. *Free system is available for new residential customers only, renters’ program available.

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