Top 20 Samsung SMH7174BC Microwave Oven Questions & Answers

It sounds like you may have one or more bad connections on the bottom of your noise filter board. The service manual for your model is here. You or a friend can check the connections for "ring cracks," and if any are present, remove the old solder and apply fresh 60/40 tin/lead solder. If the push-on terminals are damaged, they must be replaced, too. More questions? Contact me directly here.* * always include the full model number and FCC ID number from the label on / in your microwave

Have a look at the manual Download Center Download Software Firmware Drivers Manuals Samsung

With the full model number, we could have linked you to the service manual.You can find helpful exploded view diagrams and order parts by entering your full model number here.

See these results.

0.03 ohms? Should read 'short' if it (the fuses) are good. Does your Volt Ohm Meter have a position that beeps if it reads a short? (touch one probe to the other to produce a short and observe the reading) You should get the same reading on a good fuse ... beep or reading. Is your microwave 220 volts?

There is not much that goes wrong with a microwave,really. You are on the right track. Test the fuses. If you get power but no heat, I recommend you suspect (and inspect) the door safety interlock micro switches. If these switches fail, the oven doesnt know if the door is open or closed.

Let me know what you find out please ...

Thanks for your interest in FixYa.com

Hi wmp_44,

SE stands for "Sensor Error". This appears if the keypad is held down for longer than 10 seconds but if not held down this means that your humidity sensor has shorted and needs to be replaced. You will need to uninstall the entire unit and remove the outer shell to access the sensor that needs to be replaced. It will be mounted somewhere around one of the vent on the cavity of the microwave. You may contact Sears for the replacement part at 1-800-252-1698; M-F 6:30 AM-10:30 PM - Sat 7:00 AM-9:30 PM - Sun 7:30 AM-9:30 PM - All times Central.

Hope this helps.

Thank you for using FixYa.

Hi,

Investigate these three areas if your microwave won't heat

Power Diode

A 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 and you will hear a buzzing noise. Test the diode to determine if this is the cause of your problem. Replace it if it is defective.

Testing a diode

NOTE: 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 Capacitor

A capacitor is an electrical device which stores electricity. A defective capacitor may be why your microwave is not heating but you are hearing a buzzing or humming noise. 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.

Magnetron

A defective magnetron is the third possible cause of why your microwave is not heating, but you can hear a buzzing noise. Test your microwave's magnetron. Replace it if it is defective.

Testing a magnetron

NOTE: 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_diode

http://www.fixya.com/support/r7088317-discharge_microwave_ovens_capacitor

I hope the above is helpful.

Hello & Welcome to FixYa

E-63 error code in your Samsung Microwave is a T1 maximum timer error which means that the power control board has gone bad and needs replacement. However, before replacing it you can unplug the unit for 5-10 minutes to do a hard reset, if the problem is back then replacing the PCB is recommended repair. Please get back to me if you have any other questions.

Kevin

If there is no heating please do not switch on unless you have confirmed the fault. It is possible that the Magnetron is faulty, the temperature cut off is faulty or the main capacitor is short. It is also quite possible that insect can get into the oven and create soft spots. When you switch on these will create a short and make the voltage jump and in the long run damage the magnetron.
So Remove cover after disconnecting , check for dirt/moisture in the cabin, if so wipe clean and dry, check the magnetron and area clean and use an jet air to clean off.
Make sure that the program controller is working if not check power - step down supply, the pads are responding- if not faulty pads- or the door switches, if contact is not through the microwave will not work.

Now keeping clear of the microwave, switch on, use a cup of water inside to test. If you notice any sparks shut off as the magnetron or the main HT capacitor can be faulty. replace with same type.If there is heating without any issues, you can use the microwave safely

For testing Magnettron please check this link: http://www.gallawa.com/microtech/mag_test.html

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You have two options:

1. You can purchase a new control circuit board (part number RAS-SOTR2-00 ) from the Pros here for $76.17. They're our favorite supplier.

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.

Then you unplug the keypad (as per the photo below) and swap the new circuit board into your frame.


Some connectors on the relays may have a lock:


2. Or we can repair yours for $39.95. Details are here.

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

it's warm elemen can use.
it mus replace element fron distributor center shop

There is a tube I believe, in microwaves that produce the waves that heat the food. A fan usually disperses the waves to make the heating more even, rather than cooking one spot and leaving the rest cold or frozen.

Replace it. Cheaper than the fix, unless it is only the fan. But you still have to take it in, and there will be a service charge on top of the parts replacement.

Hi,
When a micro wave quits heating there can be a number of different issues that could cause it not to heat. Because of the way a microwave works it is best to have it checked out by a professional that knows how to handle the high voltages that can be present inside a microwave oven.

Here is a tip that I wrote about troubleshooting microwave ovens and explains things in more detail.

Hi,
Here is a tip that will help you to figure out what is wrong with yourMicrowave Oven....

Microwave Oven Basic Troubleshooting Tips

heatman101

The magnetron (the part that heats the food) may be bad or the circuitry to the magnetron may have burned out. Basically my advice is that if you have no electrical expertise, it isn't worth fixing. The magnetron if bad, costs almost as much as a new microwave. If you open it up (make sure it has been unplugged for a few hours and don't seen any obvious burnt parts, then most likely the magnetron is done and a new microwave is the way to go.

Let me know how this works out for you.

Benjamin

Hi,
Here is a tip that will help you to figure out what is wrong with yourMicrowave Oven....

Basic Microwave Oven TroubleshootingTips

heatman101/,..

E63 is a "T1 Max Time error".

It may mean you have a bad PCB assembly, but I would suggest a hard reset.

Unplug it from the wall outlet for a minute, then plug it back in and try again.

Feel free to contact me directly (and please remind me of your full model number from the tag on the unit) for more information & help.

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

William E. Miller, AS-EET
[email protected]
http://www.microwavedisplay.com
Microwave Oven Control Panel Repair Nationwide

id say there is a bad connection somewhere and is arcing due to that which is causing it to trip breakers. so when you banged it and it started it made a connection and then stopped when you turned it on. open up the back abd just pull the wires anywhere connections are made and see if any are lose.

va dorma

Test the high voltage capacitor,the rectifier diode.or the magnetron.

If it additionally does not spin and no light, then check also the door switch.

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.
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).