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No Power Whirlpool RM278PXL Built In Oven Microwave Combo

built in oven built in microwave rm278pxl

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12 replies to this topic

#1 freedomfive

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Posted 03 June 2012 - 05:14 PM

Hi guys! So, today is officially the first day of taking our property maintenance and repair business full time. Well, I've been doing it full time for a while now but my husband has finally made the leap and left his other job (I'm so proud of him- it takes a lot to start up on your own like most of you have done!) I am so thankful for this forum and the help I have received here so far, and I look forward to learning more and having my experiences help others. Here is the situation I am requesting help on for a call I am going on tomorrow:

Early 1980's built in microwave/oven combo Whirlpool RM278PXL. The microwave was acting up (overheating things?) and then today no power to either the microwave or oven. Owner checked and no gfci or circuit tripped. What should I be looking at/ testing? I have looked at RepairClinic and there still are some parts available.

Thanks in advance,

Natasha

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#2 Samurai Appliance Repair Man

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Posted 03 June 2012 - 06:58 PM

Hi Natasha,

Congrats on the Big Leap! It's a scary but exciting time-- there's nothing like being your own boss. And you actually have more job security being self-employed than you do working for The Man because you're more in control of your own destiny.

Do you have the tech sheet or wiring diagram for this unit? There has to be a thermal cutoff that's tripped and killing power to the unit. Also, have you checked the incoming power supply with a meter?

#3 RegUS_PatOff

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Posted 03 June 2012 - 07:46 PM

... no power to either the microwave or oven.

no power to either Oven ?
then it's a connection box OR house power problem
.

one of my video productions: “Easter Seals: Walk With Me”

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#4 NCARepair

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Posted 03 June 2012 - 07:46 PM

There should not be any cut outs to the oven portion of this combo. Check breaker for 220 volts first then the supply line behind the unit.

#5 freedomfive

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Posted 04 June 2012 - 06:48 AM

Hi Guys,

Thanks for the suggestions (and encouragement!)

Today will be my first time on site so I will look at the power supply and see....

Natasha

#6 freedomfive

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Posted 04 June 2012 - 10:29 PM

Alright...life is never what it seems ;) When I went on site I found out that the original info I had was wrong: the oven is working just fine, it is only the microwave that is having problems. They said it started this last week: one time it really overheated water- they said the water was in the regular amount of time but when they drank it, their mouth was burnt. Then it didn't work.

When I arrived the display read "000" and the light worked when I opened the door so it obviously had power. I put in a wet dishrag and turned it on. It ran and the rag was heated. I guess it's one of those things like the symptoms always disappear at the Dr's office ;)

So, what should I be checking?

Thanks in advance,

Natasha

#7 Budget Appliance Repair

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Posted 05 June 2012 - 05:54 AM

I never heard of a microwave heating too much!!!!

Probably operator error, put in a much longer time then they meant to and didn't realize it.
William Burk (Willie)
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#8 Samurai Appliance Repair Man

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Posted 05 June 2012 - 07:16 AM

I never heard of a microwave heating too much!!!!


Me neither! I think they left something in there too long and, coincidentally, one of the HV components failed later. There may be no connection between the "overheating" and component failure.

Here's how to troubleshoot the microwave using the Divide and Conquer Method™ ==> http://appliantology...conquer-method/

#9 freedomfive

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Posted 05 June 2012 - 08:10 AM

Thank you for the responses. I hadn't seen the the microwave "divide and conquer" method yet- that will be very helpful!

Thanks again,

Natasha

#10 NCARepair

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Posted 05 June 2012 - 06:31 PM

This microwave has a broken stirrer belt. Part #311958. Drop down the control panel and reach up to the left above the cavity. Work the belt around the pulley with one hand while keeping tension on it so it stays on then hook it to the small pulley on the blower motor. When this belt breaks you will have hot spots in the oven. Easy to see how this works if you purchase a magic light bar from your supplier. They are about $5.00.

#11 Budget Appliance Repair

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Posted 06 June 2012 - 05:58 AM

NCARepair, very good thought. I forgot about that, not many microwaves use a belt to turn the stirrer fan anymore. Most are turned by the air flow from the cooling fan or just have a mica wave guide cover now days.

If there is a stirrer fan in a microwave and for some reason it doesn't turn NCARepair is absolutely correct that you will have hot spots and if the item being heated happens to be just in that spot all the microwave beams hit it directly instead of being dispersed evenly around the microwave cavity

Edited by Budget Appliance Repair, 06 June 2012 - 06:02 AM.

William Burk (Willie)
Willie's Budget Appliance Repair
Eureka, CA 95501

#12 RegUS_PatOff

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Posted 06 June 2012 - 09:31 AM

Whirlpool RM278PXL c.1982
Belt # 18
click on picture
Posted Image
Posted Image
.

one of my video productions: “Easter Seals: Walk With Me”

every day is Down Syndrome Awareness Day
"A Child Is Waiting" . Burt Lancaster . Judy Garland . 1962

RegUS_PatOff > www.youtube.com/watch?v=oPAY2LsKVEw

#13 freedomfive

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Posted 06 June 2012 - 04:46 PM

Great sleuthing- thank you for the replies! I will go ahead and order that part from RepairClinic since it costs less than the gas back and forth to the site ;) I'll keep y'all posted...




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