Defro Komfort EKO 15KW failure "Mosfet temperature too high"

Question

Hi I have a problem with a 6-year-old heating boiler for eco peas, it's about a pop-up alarm regarding too high mosfet temperature. Company: Defra Model: Eco Comfort 15KW Driver: K1P v.2 Description of the problem: The stove works flawlessly and I would sum up as a sensational device, but .....

mipix · Accepted Answer

The mosfet controls the fan speed. Maybe the bearings just ran out and it's working with resistance. Check what is the actual temperature of the mosfet. It's probably the one with the aluminum (bright) heatsink.

mipix · Accepted Answer

No, the blue cuboid next to it.

bron67 · Answer

To replace the capacitor 1mf 305V.

darasmul · Answer

Added after 3 [minutes]: Certainly 1mf and not 1uf (I don't know but when I put it in google, I see that mf does not exist) something like that: Added after 37 : Unfortunately, I have no way to check the specific temperature. The fact is that only the silver one heats up to such a temperature that if you put your finger on it, it burns after 2 seconds. The rest is warm but only this one burns. Can this be repaired/replaced?

bron67 · Answer

Sorry. Yes 1uf 305V. The mosfet is the blower fan control transistor without a heat sink and is screwed on the board next to the blue capacitor that needs to be replaced.

darasmul · Answer

Thanks for the answer. Is that the capacitor I circled in yellow?

bron67 · Answer

The one who wrote mipix. The one marked is a mosfet transistor.

darasmul · Answer

I'm sorry I ask so much. Is it the blue one? It doesn't overheat, it's not hot at all.

andrzej55 · Answer

Yes the blue one. Just replace with a new one with the same parameters.

Gb601 · Answer

Hello, I have the same problem, only error 203 pops up or something

Kameleon007 · Answer

Hello, I have the same problem. I wanted to ask if replacing this blue capacitor solved the problem ...?

Gb601 · Answer

So it helped low cost

maystero · Answer

Hello.

I have an identical case. Tech ST K1PV4 driver.
I checked the driver and the capacitor (blue 1uF) had a loss of capacitance. I replaced with a new (identical) 1uF 305V capacitor and mosfet transistor. Unfortunately, the problem persisted. On the display I still have the message Mosfet temperature too high (error 200).
I will add that the blower in manual mode works properly (i.e. it is possible to adjust the speed).
What did I miss? Please help.

Gb601 · Answer

Please check the blower condenser and the blower duct for obstruction.

maystero · Answer

Turbine, okay. New capacitor installed (2uF/400V) The problem has not gone away.

djluki2013 · Answer

Hello . I have the same problem in the Tech ST K1PV4 controller error high temperature mosfet error 203. Replacing these 2 capacitors one in the drivers and the other in the blower, can there be something more? A colleague foreman wrote that the replacement did not help. Tomorrow I will buy both capacitors given above by you. Are the Tech ST K1PV4 drivers of the same capacity?

gersik · Answer

Also replace the mosfet.

djluki2013 · Answer

Do you have the number of this mosfet? I don't have a controller at home, only at Grandma's on the stove and I want to have all the elements to replace because I have a bit of a road. Thanks

maystero · Answer

P10NK60ZFP by ST just watch out for fakes...

klaudiakol1989 · Answer

Defro oven, tech k1pv4 controller and the same problem, high temperature mosfet on the manual blower runs for a few seconds and disconnects. What's the problem?

Added after 1 [minutes]:

Clearly something with the blowing, but what can I possibly do at this hour to make it work for me at least until the morning to get someone to check what the problem is

Gb601 · Answer

Turn off the pod

klaudiakol1989 · Answer

I mean drink? I have disabled Added after 8 [hours] 40 [minutes]: I mean drink? I have disabled

djluki2013 · Answer

Already the driver works for a week. Replacing the cube in the controller helped, it clearly had no capacity. I also replaced the cube in the blower but this one was good 2uF. I did not have a mosfet and did not replace it, but I will buy it as a spare. Thank you for your help

agamajkel · Answer

Hello, I have a slightly different problem with the K1PV2, namely with the feeder, when feeding, the feeder stops while feeding fuel, sometimes for a fraction of a second and sometimes 2s and the end of feeding is set to 5s, the stove is set in two states.
I replaced the relay because it could be heard that it turns on and off after these 5s, but it looks like it was losing electricity somewhere. Has anyone encountered such a problem and has any advice? .

kaliszfornijczyk · Answer

I have a similar problem in Defro eco 12kw. Can you tell me how did you remove the red cover?? Gray was two screws later I unscrewed 3 screws from the red one and I can't see it anymore and it still won't open ..

djluki2013 · Answer

As I remember correctly, the entire driver moves forward or backward. Then you lift and from the bottom next to the hinges of the display there are 2 screws. Unscrew and remove the red cover.

kaliszfornijczyk · Answer

Thanks. I took three days to do it because I didn't want to break anything.
In case anyone else is having problems:
1. First, on the gray cover, unscrew the 2 screws on the sides.
2. Unscrew the red cover with 2 screws on the sides and one in the middle.
3. Remove the 2 sheet metal screws connecting the back of the controller housing with the furnace sheet.
4. Move the entire housing towards you so that the metal plate catches come out.
5. Lift the front of the housing, paying attention to the cables at the back, and unscrew the 3 left and 3 right screws from the bottom so that you can remove the red cover behind the display.

djluki2013 · Answer

It is exactly as you write I did it a few months ago and I don't remember it exactly, but I knew it had to be moved and lifted.

mariowili · Answer

To make it easier for others, I'm uploading a video of how I solved this problem

Defro Komfort EKO 15KW failure "Mosfet temperature too high"

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