Even if door is closed the light inside is on and it dosent starts

1. Defective control board
2. Defective door interlock

It sounds to me that your door switches aren't working.Your oven is protected by a couple of switches that engage when you open or close the door.They control a couple of safety features and also your interior light.One of them seems defective.

One of the micro switches in the door is stuck ( faulty ) there are normally 3 switches so after removing the lid open and close the door and you will see the door latches pressing in the button of the micro switch and one of them would indicate that one of the switches is not in line with the latch to press the button in or one of the micro switches has melted inside cosign the switch to release normally open or normally closed, you need a multimeter to test the switches in that case

I had this exact same problem with my salton microwave! Even tried taking it back to the store, but with no reciept there was little they could do. Anyways try jiggling the clasps on the side of the the door, the ones that connect it to the microwave. Mind you don't jiggle too hard. Now firmly close the door, you should hear a distinct click. Now try it! The light only works when the microwave is on. The microwave won't work unless the door is closed properly and my problem was the claps were stuck! I hope this helps.

Hello :

It could be bad door switch or loose door switch mount . There are plastic mounts inside the microwave which hold the door switches and onto which the door latches lock when you close the door.

The screws on these mounts may be loose. If they get too loose, the switches will not be activated properly .

WARNING : A microwave oven is capable of giving you a serious electrical shock, even when it is unplugged. I strongly recommend you seek the assistance of an appliance repair technician when conducting any microwave oven repair .

good luck .

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I am 90% sure the running as soon as the door is closed is a bad door switch. This could possible explain all the issues with the unit. I would check that first

The "door" is telling you the door is not properly closed or a switch or two is not working properly. Start troubleshooting with the door switches. One of them is a monitor and is normally closed and opens when the door is closed. it will blow the fuse if it does not open before the other switches close. Very short time frame.
Eric

If the microwave oven operates with the door open it is a serious issue. DO NOT OPERATE IT. Call a technician immediately. The RF frequency is extremely dangerous. the safety switches inside the oven are malfunctioning and needs to be replaced

We have the R1480-series service manual for this model and have uploaded it to our site here to help you.

You will need the free Adobe Reader to view or print it.

Double-check your wiring against the "pictorial diagram".

The switches will have a "C" (common) terminal, and a "NO" (normally open) terminal, and some will have a "NC" (normally closed) terminal.

As long as those connections are the same and the voltage and current (amps) ratings are the same or higher, any number of switches will work.

Even though a door switch clicks, it may still be bad inside. Its continuity must be checked.

Door switch or mount trouble can be caused by slamming the door or by opening the door while it's cooking without hitting the Stop pad first.

There are plastic mounts inside the microwave which hold the door switches and onto which the door latches lock when you close the door.

The screws on these mounts may be loose. If they get too loose, the switches will not be activated properly.

Sometimes it's a broken tab on the switch holder, allowing the switch to rotate just out of position. This tab can be hard to see, since it is under the bottom edge of the switch.

It's easier to secure the switches with hot glue than to replace the latch heads, by the way.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.