WAECO CF60 fridge dead on 12V, was good on 240 for a couple days longer

Harrer94 · Member

WAECO CF60 fridge dead on 12V, was good on 240 for a couple days longer

DeBe · Guru

It may not have a polly fuse at all. Need pictures of the compressor control & the other board. Waeco change things on there models.

Whenarewethere · Guru

Have you disconnected it from both 240 & 12 volts for a few minutes. I did once have a strange issue on my 28L Waeco & this fixed it.

Harrer94 · Member

Right will try to disconnect both for half an hour or something.

Harrer94 · Member

Shall be the pictures

bobsa · Senior Member

Hi ,

Polyblock fuse, if this is gone the compressor will not run, they are a yellow square or round looking , have this model got one ?

The emergency override switch by-passes the thermostat, this will make the compressor run all the time,,
things will get very cold and freeze so you will have to turn the power on and off you are now the thermostat, is this happening ?

There are youtube on changing the thermostat by chopping out the underneath and refoaming the new one in

Jaycar part number for the thermister is RN3440 this a NTC 10K@25oC about $1

if this is your problem you could buy a thermister solder some wires to it and connect to the original thermostat
connection , just hang the lead into the fridge and tape the thermister to the bottom

sounds like a thermister problem to me.

cheers good luck Bob

Whenarewethere · Guru

I have opened up my 28L a few times, also added a 7amp circuit breaker for 12 volts & heavier wiring.

A few photos inside the 28L fridge. Very straight forward opening & closing them.

https://thegreynomads.activeboard.com/t65059593/extra-fridge-insulation-wattage-test/

Harrer94 · Member

Yeah it's buzzing on that little Platine where all the wires coming in (picture 3). Don't really feel like the thermistor would be gone. Which of the pictures is the polyfuse?

Harrer94 · Member

Bob where about can I find the thermistor on the board? How can I check it?

DeBe · Guru

WAECO.1.jpg WAECO.2.jpg WAECO.3.jpg There is no Polly fuses in this unit. Also a faulty thermistor does not cause the display to go out. Put the compressor module back to gether. Using 12v to power the fridge check for 12V & 5V on the marked points on the picture. The thermistor is internal & foamed in to the fridge.

-- Edited by DeBe on Monday 2nd of March 2020 07:00:17 PM

DeBe · Guru

WAECO.4.jpg To check the thermistor remove the plug from the board & measure resistance. Should be 10 K ohm @ 25deg C.

Harrer94 · Member

Have got 5 volt and 12 volt sitting on them marked spots. Plug is back in. Still not working

DeBe · Guru

WAECO.5.jpg WAECO.6.jpg There should be 5V at the marked point on the control panel.

Harrer94 · Member

So on 5v/ct are 5 volts on both sides. Thermistor plug are 2.5v with 4.4kohm and 23 degrees temperature.

DeBe · Guru

To test the thermistor resistance it needs to be unpluged from the board. If you have 5 volts at the control board then the temp display should be litup. another test is short C & T the compressor should run continously.

Harrer94 · Member

So 5 volts and 10400 ohm on it. The ct contacts I contacted with a screwdriver but nothing happen different, compressor didn't start and display stayed blank... As soon as I unplug and plug the big white plug together, display turns on for about a second or sometimes for little longer. After it's blank again.

tracks · Member

This is a long shot, I've played around with circuit boards a lot, before you start pulling bits apart this is the first thing I would do, make sure all power is disconnected and leave for an hour or so before doing anything, get a spray can of electrical contact cleaner from Jaycar or wherever and give the board and all connections, plugs etc a good spray and leave again for an hour or 2, then apply power and see if she works, I've seen boards burnt out or short circuited by all sorts things tiny bugs, dust and moisture, hope this helps, failing that its a trip to a Waeco approved service joint,

DeBe · Guru

Begining to suspect there is a fault with the display board. As a last check remove C & T terminals from compressor & put a link across the C & T terminals on the compressor, it should run. Your thermistor is fine.

-- Edited by DeBe on Tuesday 3rd of March 2020 12:28:33 PM

Harrer94 · Member

Can u explain bit better we're I need to make the link pls? I think so too, it might be the display board.

Harrer94 · Member

cleaned the board with degreaser, wd40 and a toothbrush. 240v working again, but still issue with 12volts.

Harrer94 · Member

So runs on 240 perfectly! As soon I unplug 240 and put on 12v display turns on for about a second and turns off again. Compressor doesn't start at all only on emergency mode on 12v.

Pictures from display board.

DeBe · Guru

WAECO.7.JPG Remove C & T wires & use a short link C & T. Compressor should run on 12v. Interesting to see if display lights up.

Harrer94 · Member

Compressor worked with c&t. Yeah as I said on 12volt normal mode display turns on for 1 sec and turns black after. If it turned blank it stays blank. Compressor doesn't work at all on 12 volts normal mode. Everything else seems like working now. Just this bloody 12 volt mode not...

DeBe · Guru

I think it has got to the stage where you need to find a dealer that has a display board, & a compressor module to try. Theres not mutch else in these units. The display board is where the control processor is. It does eventualy get to a point is it worth spending money on it.

Harrer94 · Member

****...displayboard or the other, would need to order cause in middle of nowhere... What could be broken on displayboard? Do u have any links for me?

Harrer94 · Member

And do u have a picture how the display board shall look like? Like one of urs, just to double check if all the solder is right.

DeBe · Guru

With surface mount components on the display board i dont consider them repairable. Only replacable if you can get them.

DeBe · Guru

www.ebay.com.au/itm/Waeco-CF35-CF40-CF50-CF60-CF80-CF110-Digital-display-pcb-verb/132793258860 Try this on Ebay around $109.

Harrer94 · Member

Right thank u so much for helping! Just another question have in total 380 watts solar power and a deep circle with 120ah. Out here western qld during Summer every day 40 degrees. After a 4 week fridge doenst get enough power. How many ampere does this fridge need if runs all day and night on Max? Setup always on low.

Whenarewethere · Guru

Around 3.8amps maximum while the compressor is running, typically 3.2amps when the battery is a little discharged. There is not a lot between the 28L & 60L models. Maybe another 0.5amp.

Before we had an auxiliary battery in the car we ran the fridge cold when driving & made sure it was off while parked.

We also got ice bricks from Bunnings & lined the evaporator coil to create thermal mass. It worked really well but you do loose some fridge volume.

Run it all morning. Again late in the day for a few hours. Leave it off at night. You want about the equivalent of about 15 minutes per hour. So about 6 hours per 24 hours. Hot weather run it a bit longer.

We can wait to have a bit of meat in town. We also use powdered milk, they are probably the main things to be careful with.