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12-04-2022, 11:37 AM
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#1
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New Member
Join Date: Jan 2021
Location: Macomb
Posts: 9
M.O.C. #28048
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Burn Marks Behind Microwave
After 4 years, our High Pointe Microwave/Convection Oven died. I replaced the internal 20 amp fuse, but it kept blowing so we needed to replace the microwave. When I removed it, we found the back of the microwave and the wall to be severely burned. Has anyone else seen this? Is this something to be concerned about before we install the new microwave?
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12-04-2022, 11:52 AM
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#2
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Montana Master
Join Date: Sep 2013
Location: Pensacola (mail forward service)
Posts: 3,198
M.O.C. #13740
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I would say that microwave had really serious issues. Have not heard of one going meltdown mode, but it must happen on occasion. If it were me, i would just restore the walls tolerance to excess heat by covering that burn area with aluminum tape used by hvac people since it is self adhesive, easy to get, easy to apply. And get a microwave of better quality to replace the onevthat tried to burn down your trailer.
__________________
2012 F350 6.7 L dually, 2013 3800RE with 6 pt leveling, Sumitomo 17.5" load range h tires, Samsung 18 cu ft residential fridge, 8k Morryde I.S. with disc brakes. Full timing since 2012.
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12-04-2022, 01:40 PM
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#3
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Montana Master
Join Date: May 2019
Location: Alton
Posts: 2,898
M.O.C. #24086
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This is not the first time I have read of this happening. When ours failed (2 years old) we replaced it with a Whirlpool, microwave only, we never used the convection oven function.
We did not see any scorch marks on the wall behind it when we removed the old one.
However, again, we never used the convection oven.
I'm wondering if perhaps using the convection oven causes this wall scorching?
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Daryl and Marianne,
2019 3130re 20th Anniversary Edition
2016 F350 Lariat
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12-04-2022, 04:01 PM
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#4
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Montana Master
Join Date: Jan 2022
Location: Shingle Springs
Posts: 2,587
M.O.C. #30417
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Yikes! That's scary. What brand MW was it?
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Tony & Donna & the best dog ever, Murphy.
2022 Montana HC, 295RL, 720 watts Solar, Onan 3600 LPG, 2K inverter, 200AH Lithium. 2020 GMC Denali 2500 6.6 Duramax, Demco 21K Auto Slide
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12-04-2022, 04:53 PM
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#5
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Montana Master
Join Date: Mar 2019
Location: Milwaukie, OR
Posts: 1,571
M.O.C. #23668
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With the unit blowing fuses it's possible that it had developed some kind of short that caused the scorching. Since that's what fuses are for then you are fortunate the fuses did their job. I like the idea of using aluminum tape on the wall before installing a new unit...an ounce of prevention...
__________________
Jeff & Sandi (and Teddy - 7lb Schnorkie)
2018 Montana HC 305RL / HW Progressive EMS
2015 RAM 3500 Laramie Longhorn Crew Cab 4x4 DRW / Demco Recon Hitch on RAM Puck Ball
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12-04-2022, 08:05 PM
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#6
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Montana Master
Join Date: Oct 2006
Location: McKinney
Posts: 7,361
M.O.C. #6433
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Does the High Pointe have a rear vent in that area? My older different brand micro/convection had a metal duct from the rear up the back and across the top to vent that hot air out the front rather than inside the cabinet. I am of the opinion a convection oven must be vented outside the cabinet some way. Microwave only not so much.
That does look scary.
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Bill & Patricia
Riley, our Golden
2007 3075RL (recently sold, currently without)
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12-07-2022, 05:00 PM
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#7
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Established Member
Join Date: Jun 2018
Location: santa cruz
Posts: 35
M.O.C. #22049
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Quote:
Originally Posted by DoctorD
After 4 years, our High Pointe Microwave/Convection Oven died. I replaced the internal 20 amp fuse, but it kept blowing so we needed to replace the microwave. When I removed it, we found the back of the microwave and the wall to be severely burned. Has anyone else seen this? Is this something to be concerned about before we install the new microwave?
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Had exactly the same issue. Discovered the old micro had the fan blowing outward which should’ve been connected to an exterior vent pipe. I covered the wall in heat shield and ensured the fan was set for self ventilation-I.e.-blowing to the front.
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12-07-2022, 06:59 PM
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#8
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Montana Master
Join Date: Jan 2018
Location: Granger TX
Posts: 2,597
M.O.C. #21044
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DoctorD - just curious…is that black thing in your photo covering up a vent to the outside? My unit has an exterior vent behind the microwave. I have never taken the microwave out so I don’t know what it looks like behind the unit. I went looking for videos showing folks replacing their Highpointe unit - and I found one from a guy replacing his in a Solitude 5th wheel (see screen shot). I noticed there is a heat shield taped to the wall in the same area of your burn mark. There is no vent in this Solitude.
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MikenDebbie Aggie ‘77 in the sticks near Austin TX
2019 Chevy 3500 High Country DRW
2018 Montana 3921FB
Aussie Gus + Texas Heeler Jimmy
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12-08-2022, 06:00 AM
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#9
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Montana Master
Join Date: Jul 2014
Location: Upstate NY
Posts: 1,789
M.O.C. #14547
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Ours had an actual microwave plus a gas oven not a convection oven. With that said we have a countertop convection oven at the house. It gets very hot, possibly hot enough to scorch wood. I'm of the opinion that an enclosed, generally unvented convection oven with the very thin and low end wood used in RV cabinets is an incorrect application and is a fire waiting to happen.
Yeah, I know, no other oven in these current cost reduced, bottom line directed RVs - but how often is an oven actually used.
__________________
Dave W
2014 Montana High Country 343RL (Sold!)
2011 Ford 6.7 Lariat CCLB (Went to PU Heaven)
2019 F150SC XLT SE Sport,w/full tow package
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12-08-2022, 07:02 AM
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#10
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New Member
Join Date: Feb 2019
Location: WIchita
Posts: 2
M.O.C. #23465
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Burn marks on wall
Quote:
Originally Posted by DoctorD
After 4 years, our High Pointe Microwave/Convection Oven died. I replaced the internal 20 amp fuse, but it kept blowing so we needed to replace the microwave. When I removed it, we found the back of the microwave and the wall to be severely burned. Has anyone else seen this? Is this something to be concerned about before we install the new microwave?
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Grand Design had the same problem with the High Point microwave / convection oven. Their fix was a aluminum plate on the wall behind the unit. The problem was driven when using the convection feature of the micro wave. Haven't heard of any problems since. The fix has been out since 2020 I believe.
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12-08-2022, 12:00 PM
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#11
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Established Member
Join Date: Sep 2014
Location: Wenatchee
Posts: 39
M.O.C. #14662
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A rule of thumb I was taught by an electrician. If you have to reset a circuit breaker or replace a fuse - never do it more than three times without finding out what the problem is. We had some major problems that could have been avoided by following this rule.
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10-29-2023, 03:44 PM
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#12
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Established Member
Join Date: Sep 2023
Location: St Augustine
Posts: 30
M.O.C. #33414
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Quote:
Originally Posted by Daryles
This is not the first time I have read of this happening. When ours failed (2 years old) we replaced it with a Whirlpool, microwave only, we never used the convection oven function.
We did not see any scorch marks on the wall behind it when we removed the old one.
However, again, we never used the convection oven.
I'm wondering if perhaps using the convection oven causes this wall scorching?
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What model Whirlpool did you get and from where? Did you have to cut the backsplash tile any?
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10-29-2023, 03:49 PM
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#13
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Established Member
Join Date: Sep 2023
Location: St Augustine
Posts: 30
M.O.C. #33414
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Quote:
Originally Posted by sberlin
Had exactly the same issue. Discovered the old micro had the fan blowing outward which should’ve been connected to an exterior vent pipe. I covered the wall in heat shield and ensured the fan was set for self ventilation-I.e.-blowing to the front.
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Thinking about replacing my microwave/convection to just microwave. Is self ventilation a good way to go? If I use the stove below and need the fan on, won’t the hot air come into the kitchen. ?
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10-29-2023, 11:20 PM
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#14
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Montana Master
Join Date: May 2019
Location: Alton
Posts: 2,898
M.O.C. #24086
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Quote:
Originally Posted by bgjon56
What model Whirlpool did you get and from where? Did you have to cut the backsplash tile any?
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Microwave: Whirlpool model WMH31017HZ04. From Lowes.
Yes, I had to cut a little bit for the vent in the back to fit properly. You would think they would be universal fit for the vent.
Yes I had to remove the top row of tile under the microwave to make it fit.
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10-30-2023, 07:04 AM
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#15
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Established Member
Join Date: Sep 2023
Location: St Augustine
Posts: 30
M.O.C. #33414
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Quote:
Originally Posted by Daryles
Microwave: Whirlpool model WMH31017HZ04. From Lowes.
Yes, I had to cut a little bit for the vent in the back to fit properly. You would think they would be universal fit for the vent.
Yes I had to remove the top row of tile under the microwave to make it fit.
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What do you think about eliminating the rear vent all together and using the microwave with the recirculating feature.
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10-30-2023, 07:16 AM
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#16
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Montana Master
Join Date: May 2019
Location: Alton
Posts: 2,898
M.O.C. #24086
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Quote:
Originally Posted by bgjon56
What do you think about eliminating the rear vent all together and using the microwave with the recirculating feature.
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I guess that would depend on how often you burn something on the stove and the smoke alarm goes off. Our smoke detector goes of frequently just from cooking without burning anything so we turn on the microwave vent fan when we start cooking.
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