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Re: Hoover HNWF7148 error codes
Ok I’ll have a look at that tomorrow and let you know I’ll wash it off in IPA and recoat it in an insulating laquer used on Military PCB’s. I had taken it off to remove it from the main machine body to determine if the switches were sending false signals during vibrations of the drum. but this did not have any affect on the “flashes”. so I di put it back. I admit I didn’t think about water ingress since there is a plastic film on the switch side and it did look intact. However its a piece of good information and thanks for being so modest.
Re: Hoover HNWF7148 error codes
The local tip has been re-branded as a “re-cycling centre” and as the machine is nearly new,and so theoretically should have worked, I’m not going to throw it away untill I have solved the problem. Its good to see its a difficult one since there are no suggestions of a “..what i would do or what I did was…” nature, so I’ll just keep going.
As for the NTC component, I was not pointing a finger at it, just eliminating it from the possible suspects, by making sure it worked and measured ok. I also have a substitute device for a “quick fix” of the original component for a cost of 35p rather than the £12. I am not reccomending it as a full time fix, just a-get-you-out-of-trouble-since-the-part-wasn’t-delivered repair
Re: Hoover HNWF7148 error codes
Many thanks for the concern on the costs lads, its good to see things like that in these forums. I am not too worried by the costs and I’ll give you a bit of background to the machine and it may help.
I saw it outside a house on my travels, and on returning 8 hours later it was still there. It looked newish, so I knocked on the door to enquire if I could have it. I was told the bin men wouldn’t take it and I was welcome to it. I then got some of its history. It was not very old and since it had had numerous service vists and new parts the supplier had deemed it uneconomical to go further and had replaced it. As I loaded into my car I was handed a box of spare parts containing a lower drum temperature sensor, thermal re-settable fuses and a boxed control assembly.
As for the NTC sensor this is tested at 0C, room temp, and 100C and resistance measurements taken. The device inside it is a GE type DK NTC thermstor. Now I agree I dont know the tolerances, but I’ll have at a guess and say its a part number DF503*5. The temperature /resistance readings at those three temperatures are close enough to the resistance tables for this device for a substitute to be bought from RS or FARNELL at the sum of 0.35p each and the comparisons to be re-run.
Re: Hoover HNWF7148 error codes
Oh I see, and if there was a component with a code 41013142 should I see what effect changing this would have?
Re: Hoover HNWF7148 error codes
Oh sorry, no it doesn’t tumble dry. It starts and the heaters do switch on and the aluminium tube gets warm, and then it stops.
Re: Hoover HNWF7148 error codes
Received the new module, and it is slightly different, Fitted it and the machine nearly works exactly the same as before. It will start a cycle, but never finish. So now I’ll start replacing each part one by one untill it is fixed and then put back the others to see if the fault returns. Any one have the resistance readings readings for the sensors and heaters, , hot and cold?
Re: Hoover HNWF7148 error codes
I am going to go for the replace module approach. I wasn’t looking for a repair at board level, just checking that all the components on the board are ok, which they are, so it could be the software. espares used to sell an unprogrammed board , so where would anyone outside of the H/C organisation get one programmed up? on a last note before I shut up, where would i ask if anyone out there has any of these boards, presumably faulty? or do they send them back to H/C on an exchange basis?
Re: Hoover HNWF7148 error codes
Well there was an answer of sorts, but it doesn’t help with solving the problem and I wasn’t expecting an expert to “offer a fix” for the machine. The error 11 code can mean wiring, or faulty module acccording to GIAS. Ok so as a technician one would check the wiring with a meter, and assuming all the sensors worked according to specification by using a meter and hot water to alter their characteristics, one can assume these are working correctly as well. No the machine starts , fills, spins, empties, heaters start up ok etc, but it cannot finish a cycle. It”knows” how to start, but seems to be stopping after a set period. I can agree that by changing the module it would fix the machine, but since the module isn’t fried – meaning there are no damaged components, then all I can think is that the software is corrupt and all the module needs is re-programming. So as this discussion continues I would also add does anyone know of any differences between a 7148 machine core module and a 7166 core module, as they appear to be physically the same?
Re: Hoover HNWF7148 error codes
Now that’s what I would think, but there are no components ” burnt” and all measure to be within their tolerances. Since the machine nearly works, I am lead to the conclusion that the software on the processor IC is corrupt and this is halting the machine. There has to be a “hoover” expert out there that can provide some information on the main board, or offer a re-programming service. If i just change it, then that hasn’t really identified the fault.
