I purchased a Microwave from Whirlpool. The rotating glass broken. On top of it "MAGICOOK-20G- (Galaxy) is printed. Pl. help me Dr.K.Shankar

Several free magicook manuals at the link below:

https://www.manualslib.com/manual/1072602/Whirlpool-Magicook-20g.html

Let's find you a new one

https://searchmanuals.net/search7/?keyword=%2Bowners+%2Bmanuals&gclid=CjwKCAiAqt7jBRAcEiwAof2uKwzE1jBmBNKl9hqWd4TyeToXsj80tGOrdxRc3s6LGEWtoEA-xsOXLBoCIhQQAvD_BwE

You do not preheat a microwave oven. They are either on or off.
Be sure you never put any type of metal in a microwave oven.

You can download Whirlpool owner's manuals and installation instructions here.

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

the internal switch wires are inverted

I don't think there is a solution to aquiring a user manual as I have googled all international and national web sites and they bare all requesting a user manual.
Sorry

http://www.espares.co.uk/search/whirlpool/p/0/278?utm_source=google&utm_medium=cpc&utm_term=whirlpool&utm_campaign=Spares_Whirlpool

or log on to the manufacturer's web site, whirlpool.com, I think you will be pleasantly surprised as usually one is able to download, by model number, Customer Instruction Manuals, and a list of Dealers as required.

Just Google the manufacturer's name and follow the links. Make certain you are directed to the manufacturer's web site as some search engines direct you to other sites and they charge for the information that is normally free of charge.

I hope this helps.

how to set crisp mode, force air mode and jet mode in whirlpool magicook 25C.

Did you get answer about it? I have same question :(

Test the high voltage capacitor,the rectifier diode.or the magnetron. If all this are fine, test the control board.

The diode and capacitors can br tested. The capacitor must be alloweddischarge before testing, or you risk to get electrocuted, even ifpower is off. Capacitors can get discharged by shorting their twocontacts.
Before replacing the magnetron test also the control board.
Replace the magnetron if the checks and all of the high voltage component tests are good, but the unit still does not heat.



All locations, and description of this parts can be located using the diagram here: Counter top.

Parts must be tested to find out what is wrong.

Remember that microwaves are potentially dangerous devices if not repaired properly, the job must be done by a competent person.
A microwave energy leakage test must always be performed when the oven is serviced for any reason.

Regarding parts, contact the seller here to purchase parts. (here in UK).