Hoover HBWD8514TAHC-80 Not heating water

[Grahamd]

Hello! 

Model Hoover HBWD8514TAHC-80

My washer dryer has stopped heating the water up for the wash cycle. Tried a hot wash and have stopped the machine mid cycle, opened the door and its freezing cold. Clothes don't seem to be washing very well either!

I have checked the heater under the drum with a multimeter, reading 37ohms. The thermostat attached onto the heater matrix is reading 19.98K which by the specs on the new one should be reading 20K so I assume that is also a respectable reading.

The drying cycles work fine, heats up well. No error codes, I have also followed the troubleshooting guide to no avail.

 

When we bought the machine we had a fault with the drying cycle and had a repair from Hoover. The guy that came out said that there were two interlocks for thermal protection that are prone to failing, one on the dryer side and one on the washing side. I have had a look through the schematics for the machine and can't see anything on the wash side, only a safety switch on the air feed into the top of the drum. Assuming it can't be them as its a different part of the machine to where the water reservoir is. 

 

Any help please? What else could it be and what can I check to diagnose the fault? Any help greatly appreciated  thank you.

 

Graham

 

Edited January 25 by Grahamd

[Whitegoodshelp (Andy)]

Hello Graham. If the heater is not working on the wash cycle, then you should normally expect the washing machine to abort the wash cycle after up to half an hour or so, and display an error code. If it doesn't do this, and carries on the wash cycle right through to the end, then it's not really supposed to do that. It's not supposed to be possible, so the implication is that the heater must be working.

The reasons for this is that all modern washing machines are run by software. This software monitors the water temperature for increases. If after a set time limit during the heating cycle, if the water has not increased in temperature, then the software knows that the heater isn't working. It will then abort the cycle and produce an error code that reports a fault on the heating.

But having said that, I have heard of anomalies where a fault is not recognised. Sometimes the washing machine may stick on the last minute. This behaviour is not designed but some sort of failing.

The heating element for the wash cycle, commonly underneath the door seal at the front of the outer drum, usually has a built-in thermal overload cut out (TOC), so if the cutout has tripped then you would get open circuit on the heater terminals.

So if your washing machine is definitely not heating up the water, and the heating element is giving a proper reading, then a fault is likely to be somewhere on the wiring (ie poor connections or broken wires), or possibly the thermostat (which would be a small device close to the heating element at the front of the drum) or for some reason the heater is not being supplied with power by the pcb. Some of the PCBs have relays inside them that which power to the heating element and they are known to sometimes stick or go faulty.

 

 

[Grahamd]

Thanks for that mate, much appreciated. I cannot find a TOC on the parts description for the wash cycle heater matrix. There is a thermostat that is built into the heater. The manufacturer says this should read 20k on the ohmmeter, which it does. So I assume this is not faulty. The heater is located at the back of the drum on this model and can be seen as soon as the back cover is removed. The heater for the dryer is at the top but this cannot be at fault as it is still working. There appears to be two TOC at the top on the dryer arm that is fed by the drying fan. Assuming these won't be to fault as the drying function works fine.

I have attached a parts diagram where the heater is located, I cannot see any other locations where a TOC is present for the wash cycle bar the thermostat.

 

Any ideas if there is/where to find a TOC for the wash cycle?

 

We have put the machine on a white 90C wash to see if we can feel any warmth through the glass, I assume at that high temperature we should still be able to feel some heat coming through if it was working properly. Just like we can for the dry cycle. Thanks for your reply.

 

Heater for wash cycle is part 286 and has the thermostat built into the frame of it. Which I assume is part 287/287B model dependant. There is nothing else in that area that I can see that is near the heater.

[Whitegoodshelp (Andy)]

5 minutes ago, Grahamd said:

I cannot find a TOC on the parts description for the wash cycle heater

Hi Graham, no, I said it's part of the heating element and if it blows the heater will be open circuit.

[Grahamd]

Ah yes I get what you mean. It is not reading open circuit so can only assume it is functional. The hot wash is not heating up so I can only assume now it is a wiring fault/control board fault. I will check the continuity of wires to the board and then point the finger at the PCB. May be time to replace the unit if that is the case.

 

Thanks a lot for your help, very much appreciated.

[Whitegoodshelp (Andy)]

Aye it's risky replacing a pcb as they are expensive and you can't send them back if it doesn't fix the fault. Does it not heat up on any cycle?  Also, does the washer run the cycle as normal and take the normal amount of time otherwise?