Top 20 Whirlpool MH7140XF Microwave Oven Questions & Answers

2004 model will probably have trouble getting the magnetron for it or the program board to repair it Generally the cost to diagnose it and the parts problem would make a replacement unit with a warranty a better proposition

the oven is short I suggest checking the capacitors and the power supply lines

warranty starts from the purchase day not manufacture date your bank statement is proof of purchase as it has the date , the amount and where you got it from

Most microwave doors are just clipped together with plastic tabs.To remove the inner door panel you need to carefully pry the plastic frame off the inside with something like a small screwdriver or putty knife. Even being careful you may end up breaking the tabs or frame. Once the inner frame is removed you should be able to get to the handle screws. I'll try to attach a picture of the door breakdown.

http://www.repairclinic.com/RepairHelp/How-To-Fix-A-Microwave/77---/Microwave-exhaust-fan-not-working you check on this one. It might help..

Search for Microwave Spray Paint on eBay or Amazon.com. If you need further help, reach me via phone at https://www.6ya.com/expert/ronald_e6b9572cebe3ad27

Check for 110Vac at the center pin of the light socket. If there could be the pin needs to be pulled up a bit so it makes contact with the bulb. If no voltage, most likely relay on board is bad. Be careful around these units they are very dangerous since they have 4000+ volts insde that can easily kill you!

Turntable is normally controlled by a microswitch which may be faulty, easy to replace but reall a job for a proper repair person due to high voltage and microwaves.

go to www.repairclinic.com and get itGod bless you

Magnetron/HV Diode/HV Cap etc

yes

My whirlpool microwave hasn't worked sice powers outage. Is there usually a reset button or fuse, somewhere

The top hinge pin has narrower diameter to lock the pin to the door. Just lift the door and relieve the pin and pull it straight up, you may have to jiggle it a little bit to get it loose, no need for heavy force it will just loosens when it is in right position.

Sounds like the child lock is on. Try holding the start button down for several seconds.

The looks like the keypad controller has developed a intermittent short or smart board, you will need a pro to determine, and it will be costly.

What problem, I wonder....If you need a new one, You can find helpful exploded view diagrams and order parts by entering your full model number from the tag on the oven here.If yours is not turning, it may be grease under the plate or in the motor, a bad motor or coupler, or a problem with the control circuit board that supplies its power.I would especially suspect the board if you're recently had trouble with the cooktop lights. We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

Hello,Investigate these three areas if your microwave won't heatPower DiodeA diode is an electronic component that readily passes current in one direction only and blocks the flow of current in the opposing direction. If your microwave's diode has become defective, your microwave will not heat. Test the diode to determine if this is the cause of your problem. Replace it if it is defective.Testing a diodeNOTE: Before you test your diode, make sure your microwave is unplugged, and that you discharge the microwave's capacitor.Whether it is shorted or open, a defective diode will most likely show some sign of defect. Defective diodes will usually emit an electrical burning smell, signifying its defectiveness. Also, it may have split in two, or it may exhibit a burned crack, or possibly even a blistered spot.A shorted diode is indicated by a loud humming noise from the high voltage transformer, and no heat produced when a cook cycle is initiated. Whereas little or no heat produced in your microwave, with an absence of a humming noise is indicative of an open diode. In either case, the diode has to be replaced.With your microwave unplugged, and your capacitor discharged, use extreme caution to remove the lead that leads to the capacitor. You can leave the ground connection attached. The side of the diode that goes to the ground is usually marked with a dot, stripe, or arrow. Set your ohmmeter to R x 10,000 or higher. Touch the positive meter probe to the anode and the negative meter probe to the cathode to measure the resistance across the diode terminals. Remember that the cathode is on the side that goes to the ground, which is often marked by a dot, stripe, or an arrow.A normal diode, that is a non-defective diode, will read anywhere from 50,000 to 200,000 ohms. Differences in microwave make and model account for this large range in resistance readings.Reverse the meter probes and measure resistance while touching the positive probe to the cathode and the negative probe to the anode. Reversing the probes like this should result in a reading of infinity. Unless a bleeder resistor is present. The presence of a bleeder resistor would produce a reading of the value of the resistor.High Voltage CapacitorA capacitor is an electrical device which stores electricity. A defective capacitor may be why your microwave is not heating. The capacitor will have to be tested to determine if this is the cause of your problem. A defective capacitor will have to be replaced before your microwave will work again. Make sure you discharge the capacitor before you test it, though.MagnetronA defective magnetron is the third possible cause of why your microwave is not heating. Test your microwave's magnetron. Replace it if it is defective.Testing a magnetronNOTE: Before you test this component, make sure your microwave is unplugged, and that you have discharged the capacitor.There are two tests to conduct in order to determine whether or not a magnetron has become defective. If you receive results other than what are detailed below, you will have to replace your microwave's magnetron. Each test is described for you here:TEST 1: Locate your magnetron and label each of the wires attached to it so that you know which wires are to be replaced where. Set your ohmmeter to the lowest resistance scale. Take a resistance measurement between each of the magnetron's terminals by touching each probe to one terminal each. Reverse the probes and take a second resistance measurement. Each measurement should read less than one ohm.TEST 2: Set your ohmmeter to its highest resistance scale. Touch one of the meter's probes to a magnetron terminal. Touch the other probe to the metal magnetron housing. Take special caution to not touch the two probes together. This could result in an inaccurate reading. This test should produce a reading of infinity - indicating an open circuit.Read the tips on the below links on how to replace your microwave oven's diode and how to discharge the capacitor.http://www.fixya.com/support/r7088355-replace_microwave_ovens_diodehttp://www.fixya.com/support/r7088317-discharge_microwave_ovens_capacitorI hope the above is helpful.Regards.

Here is a service manual that might help you"http://steprightupmanuals.com/microwave-oven-service-manuals/whirlpool-microwave-oven-service-manuals/whirlpool-mh6140-mh7140-gh7145-microwave-hood-service-manualprem

You will need to remove the oven from the wall.The installation instructions will show you how, and it's best to have two people since the microwave can be heavy and awkward.If for some reason you don't still have yours, you can download Whirlpool owner's manuals and installation instructions here.You can find helpful exploded view diagrams and order parts by entering your full model number here.There should be a "mini-manual" (tech sheet) hidden inside the unit behind the control panel or hidden on the left side behind the grille, which is very helpful when troubleshooting, testing, and locating components. At our Web site, we have a video available showing how to remove a typical over the range control panel assembly in under 5 minutes. We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.