Montgomery Ward refrigerator, made by Maytag, Model NENS228GZA. I keep
a thermometer in the fresh food side of the refrigerator and yesterday
it had moved from a normal 40 degrees to 50 degrees. The freezer
showed b/n 20 and 30 degrees. We hadn't been home much, so it wasn't a
matter of opening the door too often. The ambient house temp was
around 70 degrees with 55-60 percent humidity, which is unusual. I
cannot rule out the door being partially open, but I did not notice it
before I opened it late in the day. I started by vacuuming underneath
the unit and around a fan that was located underneath the unit. Using
an exploded diagram obtained from the internet, it looks like the
condenser is not a set of coils, but something like a sheet rolled up
into a box looking "thing." The fan I cleaned was blowing onto the
condenser. I did not really clean the condenser, that seemed
impossible since I was looking at the side of it from the back of the
fridge. The inside fan located in the back of the freezer was running
fine. There isn't a fan inside the fresh food section of the fridge.
I removed the cover in the back of the freezer to reveal the evaporator
coils. They were frosted over from top to bottom and, in my opinion,
the layer of frost was fairly thick. I defrosted the coils using a
hair dryer, after unplugging the fridge. I then plugged the unit back
in, put some ice trays in the freezer, and put the thermometer back in
the fresh food section. After an hour or so, there was frost building
up on the evaporator coils again, I did nothing. That was around 10pm.
This morning at around 7am the water in the ice trays are now ice and
the thermometer shows b/n 20 and 30 degrees like before. The fresh
food section thermometer shows just below 40 degrees, which is normal.
The frost on the evaporator coils is again fairly thick, but not quite
to the top of the coils yet. BTW, I did not reinstall the metal
cover/panel in the freezer. I reinstalled only the plastic cover that,
I guess, helps deflect air into the fresh food section.
I have never noticed when the compressor was on since I've been around
this refrigerator. But it does sound like it is running all the time,
but I am not sure of that. I can say the fan inside the freezer is
always running when I open the freezer door since this problem started
yesterday. I honestly don't remember if it was running every time I
opened the freezer before.
So, my question is, is it normal for frost to build up on the
evaporator coils so quickly? I was thinking such a quick buildup meant
low freon levels. I read in other posts that it could be either a
Defrost Thermostat or a Defrost Timer. I have located both on eBay for
around $10 each. I was hoping that was going to be the problem, but
seeing such a quick buildup of frost made me think that the problem may
not be the defrost thermostat or timer. Since there is a panel
covering the coils, I just don't know how much frost is normal.
The history of the refrigerator is this. We rent this house. The
refrigerator was here when we moved in. We did not have fridge, so our
landlord agreed to let us use it with the understanding that if
anything happens to it we would be responsible. We've lived here five
and a half years.
Thanks in advance for suggestions, opinions, etc.