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Hi Folks
The evaporator of this machine had a large build up of ice that restricted the air flow with a consequent rise in temp. I went to it about 5 weeks ago with a similar complaint and found a small build up of ice next to the fan which interfered with the fan blades and stopped it, but no significant build up of ice on the evap then. The fan works fine and after I defrosted with a hair drier the fan cut in eventually as I would expect. The Partfinder breakdown does not describe any of the sensors in its listing. Can someone suggest what may be causing this 😕 .
Many thanks
Laurence
Re: Indesit C239NF Frost Free F/F
Just check that the defrost timer is working at the back (this may mean you putting a mark on spindle and casing – then going back some hours later to see if it has moved) and that there are no gaps in the door seal to cabinet front. Having assured yourself that these 2 areas are ok, then check the temps in both compartments. If you think you have a temp problem as opposed to a defrosting problem – Best of luck
Re: Indesit C239NF Frost Free F/F
Manually turn the defrost timer to defrost and check that the defrost element ..heats. The defrost sequence is around 20 mins in a working enviroment (-18) so within 20 mins it should advance off defrost and restart the compressor etc…negating a return trip several hours later.
Most f/f ice build ups are due to poor removal of water during the defrost period, check that the exit path for defrosted water is not blocked and that the defrost heater has not bent away from its intended route.
Although the defrost sequence is regulated to (approx)20 mins the sensor will switch off the element upon sensing the temperature rise with a toc as a safety device.
The only other explanation for ice build up would be a system fault…and its not easy to detect using temp readings.Is this R600 and how old is the appliance..?
kevin
Re: Indesit C239NF Frost Free F/F
Thanks for your response guys but this is all electronic and no defrost timer. It also has a 2 way solenoid valve incorporated to feed the fridge and freezer with refrigerant but I don`t suspect this as gas is getting to the freezer evap. The machine is about 2yrs old.
Laurence
Re: Indesit C239NF Frost Free F/F
Laurenceuk
Take the board from out of the fasia panel and look at resistor in R51 position. All the boards we have changed, R51 has gone up in a puff of smoke.
Why?
Who knows we were told. I tracked it down to the defrost circuit. Sent a load back to Merloni and still had no reply. Fitted new boards and never gone back to them. Phoned up the customers and everything is working ok.
Check wiring to evaporator fan, as had a lot of loose wiring connections on internal connector block at top left corner of freezer cavity. It envolves removing evaporator false plate at rear of freezer compartment.
Make sure air flow vent is clear for the fridge as also blocks with ice. It is coloured black and a transom wire element sits in it from the evaporator tray (the cause of trouble I think)There is a modification kit. A larger wattage defrost element for freezer evaporator. I can’t remember the part number though of my head. I will send it to you tomorrow.
Andy G
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