Hoover Hnwl 7146-80 - Wont Heat Up Water
I'm now convinced our Hoover HNWL 7146-80 (washer Dryer) - wont heat up water - and im beginning to think it never has done since day it was bought.
While putting on a new door seal I decided to test my suspicions about the lack of hot water in the tub
I have now had the machine on a number of hot washes but never get a live & neutral to the heater
And never get a live at what I assume is the thermostat that's positioned on the back of the drum housing
I have tried a variety of programmes but still no warmth in the tub
Any suggestions welcome
Ian
Solution Summary
AI-generated from this discussion
This thread was marked as solved. Here's a summary of the problem and the fix, generated from the discussion below.
Hoover HNWL 7146-80 washer dryer not heating water
- The problem
- The Hoover HNWL 7146-80 washer dryer was reported not to heat water on hot wash programmes. The owner found no live supply reaching either the heater or the thermostat/temperature sensor area on the back of the drum housing during testing, and suspected it may never have heated properly since purchase.
- Likely cause
- The strongest diagnosis in the discussion is that the heating circuit was being inhibited rather than the heater itself simply being open circuit. Suggested causes were a pressure switch not switching correctly, a variable temperature control issue, a poor thermistor connection, or a PCB fault. No single cause was confirmed.
- What fixed it
- The recommended action was further diagnosis of the control side of the heating circuit, particularly checking whether the pressure switch changes state correctly during a filled wash cycle. Speculative replacement of the PCB was discouraged. The exact repair was not confirmed in the thread.
- Checks to try
- Owner tested hot wash programmes and reported no live and neutral at the heater
- Owner reported no live supply at the thermostat/temperature sensor position on the back of the drum housing
- Different programmes were tried with no heating
- Pressure switch was identified as a component to test for switching during a cycle
- Parts or tools mentioned
- pressure switch
- heater
- thermistor
- PCB
- variable temperature dial
Safety: Further diagnosis should be carried out by a suitably qualified appliance engineer.
6 Answers
I have a full article on this topic here http://www.whitegoodshelp.co.uk/washing-machine-not-heating-up-water/
Normally if a washer isn't heating the water it should produce an error code as described in my article but there are anomalies - also described.
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thanks Andy - I have read it but nothing there that helps.
The fact there is no LIVE to the thermostat OR the heater at any time makes me think something is telling it "not to heat" - In this model there is a variable temp dial
I will set it on a wash tomorrow and have another go
OK, the article is designed to so that if it doesn't help - you need an engineer One thing that could prevent any heat at all would be if by any chance the variable temperature dial had a no heat setting and it was either faulty or somehow set to 0 but appearing set to a temperature. But that sounds a weird one. Could be a fault on the pcb but risky speculatively changing one. In most circumstances if the washer doesn't detect a rise in temperature over a several minute period it knows it isn't heating and generates an error cod, usually will even abort the wash. There are anomalies though such as one described in a forum discussion where it was a dodgy connection on the thermistor (linked to in my article).
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I have no idea why, but my heating element gets its power through the pressure switch. There are about 6 wires
on my pressure switch in all, one seems to be a power source coming in, and one wire goes directly to the heater.
Perhaps it's to prevent the heater being on when no water is in the drum?
Thanks Edd
The pressure switch is on my radar
Next time I have a few hours I will haul the machine out and test it for switching during a cycle
Will let you know
Ian
Yes it's to prevent heater coming on without water in machine
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