old goldstar microwave oven died


  #1  
Old 05-21-16, 11:35 AM
D
Member
Thread Starter
Join Date: Nov 2011
Location: usa
Posts: 188
Upvotes: 0
Received 0 Upvotes on 0 Posts
old goldstar microwave oven died

i have a older counter top goldstar microwave oven (dated 1995, 22 years old)
mod#ma-870mw
i just died abruptly, not even the light works.
i certainly got my moneys worth out of it, but before i trash it might this be a simple fix with an inexpensive part i could try myself?
or should i not even bother?

thanks for the input
 

Last edited by diy409; 05-21-16 at 11:57 AM.
  #2  
Old 05-21-16, 12:24 PM
J
Member
Join Date: Jan 2011
Location: USA
Posts: 4,463
Received 129 Upvotes on 114 Posts
Checked to see if there's power at the outlet?
http://www.repairclinic.com/RepairHe...eating-MA870MW
 
  #3  
Old 05-21-16, 02:26 PM
D
Member
Thread Starter
Join Date: Nov 2011
Location: usa
Posts: 188
Upvotes: 0
Received 0 Upvotes on 0 Posts
the power to the outlet is fine
 
  #4  
Old 05-21-16, 02:48 PM
PJmax's Avatar
Group Moderator
Join Date: Oct 2012
Location: Jersey
Posts: 65,675
Received 4,099 Upvotes on 3,682 Posts
It could be as simple as a blown fuse or a defective door switch.

I would recommend checking/replacing the fuse. It will most likely be a a 15A ceramic fuse.
If it's blown, you replace it and it blows again..... send the unit packing.

Make sure the unit is unplugged before removing the top cover. The fuse will be attached directly to the black wire of the incoming power cord.
 
  #5  
Old 05-23-16, 10:51 PM
D
Member
Thread Starter
Join Date: Nov 2011
Location: usa
Posts: 188
Upvotes: 0
Received 0 Upvotes on 0 Posts
i checked the fuse for continuity and there was none, i than bypassed the fuse with a jump wire and the unit worked, so your fuse suggestion was accurate.

the white ceramic fuse reads 250v 15a #65ts
where should i look for such a fuse? is this something i could find in a hardware store?

i know fuses usually hold up fairly well, could this be indicative of some other issue?

thanks
 
  #6  
Old 05-24-16, 10:03 PM
PJmax's Avatar
Group Moderator
Join Date: Oct 2012
Location: Jersey
Posts: 65,675
Received 4,099 Upvotes on 3,682 Posts
It could be the sign of a failing part. It could also gave been a momentary issue with a stuck door switch.

Some units are designed that if the microwave section gets power with the door open... a failsafe door switch shorts the high voltage causing the fuse to blow.

You could probably find it in a hardware store. The part number isn't specific. A 15A 250v ceramic fuse is fine.
 
  #7  
Old 05-24-16, 11:13 PM
ray2047's Avatar
Member
Join Date: Mar 2006
Location: USA
Posts: 29,711
Upvotes: 0
Received 15 Upvotes on 13 Posts
Last one I bought I tried Radio Shack first. The employee was comically clueless about fuses though I wasn't laughing at the time. I was a bit surprised but actually ended up finding it in the electrical aisle of Home Depot.

What I bought at Home Depot.
Name:  out.jpg
Views: 823
Size:  31.4 KB

Name:  out1.jpg
Views: 1079
Size:  43.3 KB
Note the packaging is marked for microwave ovens and it is a fast blow fuse.
 

Last edited by ray2047; 05-24-16 at 11:44 PM.
  #8  
Old 05-25-16, 07:00 PM
Join Date: Jan 2009
Location: United States
Posts: 1,067
Received 83 Upvotes on 78 Posts
What causes the fuse/breaker to blow/trip in my situation?

I once found a nice microwave in the trash
The 15 A ceramic fuse tested open
I had one of those 15a circuit breakers from a broken power strip that I wired into the circuit instead of the ceramic fuse

I made sure that there was no exposed live parts and I plugged in the unit

The VFD lit up and so did the interior lamp

So I put the microwave on the 10 % power level and as soon as the magnatron went on the small breaker I wired in tripped
 
  #9  
Old 05-25-16, 07:02 PM
PJmax's Avatar
Group Moderator
Join Date: Oct 2012
Location: Jersey
Posts: 65,675
Received 4,099 Upvotes on 3,682 Posts
It could be a shorted HV diode, defective capacitor or a shorted filament inside the magnetron.

I posted some troubleshooting links in a previous thread. Look at post 2.
http://www.doityourself.com/forum/el...wont-heat.html
 
  #10  
Old 06-11-16, 01:40 PM
D
Member
Thread Starter
Join Date: Nov 2011
Location: usa
Posts: 188
Upvotes: 0
Received 0 Upvotes on 0 Posts
update

i replaced the fuse and so far its working ok, like you said if it trips again ill trash it.

BTW
i found the fuse at home depot, they had a small section specifically for microwave fuses
 
 

Thread Tools
Search this Thread
 
Ask a Question
Question Title:
Description:
Your question will be posted in: