Electolux ER7620C Larder Fridge Ice build up

[rmacal]

Hi can anyone help please
Have ice / frost build up on back panel even when set at lowest. Can get very thick but only progresses about two thirds down panel.
No obvious problems with door seal. Compressor may be running a lot of the time but difficult to tell.
After I have defrosted it, if before it starts to ice excessively again, I turn the fridge off it defrosts quickly enough
I have been given various advice from – its definitley not the thermostat if fridge is cooling – to it must be the heater / or / heater timer
I would be grateful if any of you eperts out there can help. – thanks

[cockney steve]

Re: Electolux ER7620C Larder Fridge Ice build up

you appear to have diagnosed your problem (it’s what I would have thought as well 😆 ) you need to find/meter the defrost heater (thin “tube” wrapped round the bottom of the evaporator? )

also the thermistor (if there is one) or perhaps it’s got a Stat connection. in which case it will only be able to switch on when the fridge is cold enough to switch the compressor “off” (otherwise the compressor and heater would be fighting each other! )

[helo_75]

its a larder fridge

no thermistors, or defrost heater, just stat

stats can cause this problem just as easily as not working at all

you could try a stat… further to that, your compressors running weak, and due to the fact that your evaporator only covers 2 thirds, the latter is more likely

[rmacal]

Re: Electolux ER7620C Larder Fridge Ice build up

Thanks for the response folks
If I try replacing the stat can you advise what type I need as I cant see my fridge listed on the Whitegoods site.
There is a universal stat that states is a “K59 type universal thermostat to fit auto defrost fridges” Is this the type I am looking for?
In case its not the stat thats at fault I wouldn’t want to have to go to the expense of going to Electrolux for a part unless I had to
Thanks again for your help

[cockney steve]

Re: Electolux ER7620C Larder Fridge Ice build up

Now the proper engineers have told you, you still need to BE METHODICAL

the stat will change over…..from “cooling” (compressor)…to “heating”…..probably a delay-timer and relay, to switch the heater on.

It’s most unlikely that it would immediately switch from cooling to heating (though the Chinese may try that one)

No matter….it can switch as often as it likes…if the heater’s U/S it isn’t going to defrost! so, you need to check the heater, then check the circuit and all components that operate in the defrost circuit.

Freeze-spray is available from Maplin and is handy for testing thermostats.

taking a stab in the dark is a waste of money…..sure, you’ll eventually find the fault, but the idea of coming to this site is to save money and help the environment.

[helo_75]

its a larder fridge, it doesnt have heater, doesnt need one

[cockney steve]

Re: Electolux ER7620C Larder Fridge Ice build up

DUH! sorry, 😳 😳 :rolls: a senior moment for sure….what part of LARDER FRIDGE didn’t I see, in the title.

*slinks away*

[helo_75]

lol, s’ok mate, i do it many a time

[rmacal]

Re: Electolux ER7620C Larder Fridge Ice build up

Thanks again for the responses
Seems to be narrowed down to the stat – any thoughts on which type / specific stat I should get?

[helo_75]

yes, can u supply the pnc number? its on the ratings plate, behind one of the salad bins… usually starts with a 9…….

[admin]

Re: Electolux ER7620C Larder Fridge Ice build up

Hi

When you fully defrost the fridge,Do it for 24 hours with the door left open.
Then press the back wall with your fingers,Does it feel spongy ?if it does then there may well be a air gap between the liner and evaperator.

Bryan

[cockney steve]

Re: Electolux ER7620C Larder Fridge Ice build up

Then press the back wall with your fingers,Does it feel spongy ?if it does then there may well be a air gap between the liner and evaperator.

shirley…shouldn’t that be “a gap between the liner and the insulation?”

I thought the Evap. sat on spacers so that air could pass both sides, thus increasing thermal efficiency?
A delaminated insulation/liner bond would reduce both the gap and the insulation effectiveness.

and i won’t call you” surely, “again 😆

[admin]

Re: Electolux ER7620C Larder Fridge Ice build up

Hi Steve

Where the fridge is a wet wall the evaperator is bonded to the liner and the insulation is behind the evaperator.

Bryan

[cockney steve]

Re: Electolux ER7620C Larder Fridge Ice build up

Hi, Bryan-interesting stuff!

What’s the “advantage” (or is there a REAL benifit from the “wet wall” concept?….per my previous post, ~50{e5d1b7155a01ef1f3b9c9968eaba33524ee81600d00d4be2b4d93ac2e58cec2d} of the surface-area is not going to be doing much(unless the absorbtion surface is heavily-finned,in which case there is increased manufacturing cost though that may be marginally offset by the smaller evap needed as a consequence of the “gearing -up”…..am I being smplistic, or am I really missing something?

[rmacal]

Re: Electolux ER7620C Larder Fridge Ice build up

helo_75
Thanks for your informed input
Sorry took so long to get back but even once found where the number was I couldn’e read it with the small size and where it was located so had to wait for someone with better eyes to read it for me.
PNC 9238/2600

[Author]

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