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Home Repair Manuals Hotpoint WMA32 Dismantle & Repair

Page 17 of 50

2.6

Heater & Cut-out with Thermistor

Attributed faults

•

No Heater

•

Machine Stops Washing

•

Poor Wash Results

•

Overheating/Boiling

The heater is fitted with a thermistor as an integral part of its make up. It also has a
built in thermal cut out just in case it over heats, this cut out is not re-settable and if
it goes the heater will not work and must be replaced. The thermistor registers the
water temperature and transmits the information to the control module, which in
turn switches the heater on or off via a heater relay.

If for any reason the heater does not work the control will advance on to the next
part of the programme, without giving any warning the heater is faulty. You may
get poor wash results.

If one of the thermistor wires breaks the water will just continue to heat.

When a 95º programme is used continuously the internal cut out will blow and
the heater will not work.

If the internal filament blows it could cause the heater to short circuit and blow
the module.

If the heater comes on without water in the drum it would cause smoke to come
out of the dispenser draw.

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Содержание WMA 32 Series

Страница 1: ...eloped independent to the manufacturer of this product and no connection to them is inferred or implied Although a majority of the faults are universal to most makes and models the solutions do vary W...

Страница 2: ...er Old new 13 2 3 Pressure Switch 14 2 4 Fill Valves 15 2 5 Door Switch 16 2 6 Heater Cut out with Thermistor 17 2 7 Heater Guard 18 2 8 Tacho Generator Motor 19 2 9 Pump 20 2 10 Sump Filter Old New 2...

Страница 3: ...door to open after a wash 43 The drum turns before any water has gone in 43 The belt keeps coming off 43 Drum stopped 43 Noisy 44 Machine is over filling 44 Machine keeps filling 44 Not taking in fab...

Страница 4: ...ou are an engineer yourself you probably can t well not at first anyway Here are two scenarios 1 A good engineer inspects your machine and decides it needs a part he does not have He tells you he has...

Страница 5: ...al of Door seal restraints 7 Multi Meter For all electrical testing 8 13mm ring spanner For removal of stabilizer leg pegs 9 Ratchet To work with 11 12 13 or 14 10 Screwdriver with removable bits Star...

Страница 6: ...wiring insulation anywhere in the system Set your meter to MegOhms M and connect one of the leads to an earth this can be the plug or the cabinet or any point that is earthed on the machine Connect t...

Страница 7: ...l 8 Press the button and you should get a reading of about 1 5 This reading is very much dependant on the condition of the motor brushes Brand new brushes that have not been worn in will give a far hi...

Страница 8: ...r unless you have a digital meter you won t be able to determine the exact reading just that the needle is between 100 and 200 If there is no reading it could be the wire is broken or you have a fault...

Страница 9: ...re is reached the drum will agitate at whatever speed the wash program dictates Fast for cotton or slow for woollens And it will rotate so many tumbles in one direction then so many in the reverse dir...

Страница 10: ...module Most electronic operations are activated via the internal switching of the control module however these rarely are the sole cause of a problem and normally if they do blow a circuit it is becau...

Страница 11: ...ged drum loose Tearing drum damaged lifters damaged Pulley Noisy crack in pulley pulley loose Belt Noisy damaged belt No spin belt off broken Dispenser Leak dispenser clogged with old soap dispenser d...

Страница 12: ...eaper to call out Hotpoint If you want to have a go at fixing it Remember A blown track would almost certainly represent an electrical fault so check Wiring connections on Module Motor Pump Pressure s...

Страница 13: ...hose triggers the switch and so turns off the fill valve Blockages are the main cause for concern with the pressure chamber and they happen because some of the grime and excess detergent build up in...

Страница 14: ...ch activates and deactivates the internal switch s This diaphragm is controlled by the Pressure Chamber and the small bore hose connecting both There is also a flood level switch that operates if the...

Страница 15: ...cases the valve has to be replaced unless you can lever the coil off the coloured section with the metal band around it Then it is just a case of replacing that Be very careful if you attempt this ki...

Страница 16: ...kes considerably longer to cool down that is why there is about a 2 minute pause after the wash before you can open the door If the bimetallic strip no longer functions the switch becomes inactive If...

Страница 17: ...nd transmits the information to the control module which in turn switches the heater on or off via a heater relay If for any reason the heater does not work the control will advance on to the next par...

Страница 18: ...it revolves Because it lips under part of the container it can only be fitted onto the heater one way If a coin or something gets into the gap between the inner drum and container it could hit and dis...

Страница 19: ...r is a slightly off set magnet inside a field coil on the rear of the motor which sends information to the module this information determines the speed of the motor and whether or not the drum is out...

Страница 20: ...n a cotton bud or elastic band can prevent the impellor from turning The impellor on these pumps do not spin freely when flicked so don t think that they are faulty for that reason Small items do get...

Страница 21: ...st engineers removed them when servicing the machines during the guaranty period Included in the moulding of the sump is the pressure chamber A large bore hose connects the sump to the pump housing Th...

Страница 22: ...the container from twisting during the wash or spin and give a bit of assistance with its balance They are located either side on the lower half of the container and held in place by a plastic peg on...

Страница 23: ...se out but some of it finds its way back and onto the washing in the form of little grease balls As the worn bearings get worse they allow movement in the drum support which may only be a few centimet...

Страница 24: ...e with a cable tie Through the door opening rotate the drum slowly anti clock wise this will draw the belt onto the pulley and the cable tie will snap when the belt is fully on If the belt is frayed i...

Страница 25: ...screws and plastic caps 2 Soap dispenser Draw Removal 1 Pull dispenser out as far as it will come 2 Press down the blue tab in the centre of the drawer at the rear and pull the drawer all the way out...

Страница 26: ...module from the facia by easing the retaining clips outward whilst gently lifting the module 5 Do this to each clip and the board will come free 4a Control Module Fitting 1 Follow the same precautiona...

Страница 27: ...front panel upwards and it will unhook from the cabinet Place somewhere out of the way 5a Front Panel Fitting 1 Hook the panel on the location points at front edge of the cabinet and slot it downward...

Страница 28: ...3 5 3 Use a 13mm socket spanner or torque wrench if you have one 4 Undo the bolts counter clockwise 5 Remove weight and metal washer shims 7a Balance weights Fitting 1 Fit metal washer shims 2 Fit bal...

Страница 29: ...all fill valve hoses make sure they are connected to the right nozzles 3 Reconnect the dispenser outlet hose to the front of the container 4 Now do 5a 3a 2a 1a 10 Pressure switch Removal 1 Remove the...

Страница 30: ...f the valve in whilst turning it anti clockwise Start on the double valve first 5 Remove internal hose 11a Solenoid valves Fitting 1 Start with the single valve and fit the black internal hose put a c...

Страница 31: ...the machine too much in case it topples over If possible get someone in front of it Just in case 5 These pumps just slot into the cabinet and can be unhooked while the hoses are still attached 6 There...

Страница 32: ...nd twist it free from the container 6 Remove the small hose on the side and lift the sump clear 13a Sump Pressure chamber Fitting 1 Before refitting the sump make sure the filter is clean and the pres...

Страница 33: ...is a water shield and must be replaced with the motor 14a Motor Fitting 1 The water shield is the first thing to go back on the motor prior to refitting This item is for your own safety and should not...

Страница 34: ...lug so it can be knocked out 5 Place a rod on the end of the peg and hit it 6 Lift stabilizer out Lower mounting comes in two halves Fig 2 picture without stabilizer leg fitted 15a Stabilizer Fitting...

Страница 35: ...d tighten the centre nut Make sure the heater bracket is located in the container correctly if the heater has gone in straight and you can t tilt it upwards then it has located correctly 4 Refit the w...

Страница 36: ...top cover 1a 19 Container Outer drum Removal The easiest route for the container to come out of the cabinet is through the front although some people choose to take it out through the top of the cabi...

Страница 37: ...um Fitting 1 Stand the inner drum on end with the drum support facing up and lower the rear half of the container onto it 2 Push down as hard as possible then fit the pulley on the spigot 3 Fit washer...

Страница 38: ...plier and compare them There are two sizes used on the WMA range of machines 30m and 35m The size difference is dependant on the spin speed of your appliance If you have 30m bearing and have to get 35...

Страница 39: ...or the latch it may spring out You could take the door off without removing the hinge but you may break it trying to put it back Unless you have two pairs of hands 22a Door Assembly Fitting 1 Lay the...

Страница 40: ...lifter towards the front of the drum this will break the lug that holds it in place 2 Discard DO NOT TRY TO REUSE BECAUSE IT WILL COME OUT AND YOUR WASHING WILL GET DRAWN THROUGH THE HOLES BENEATH AN...

Страница 41: ...power cable connects to the machine This is located at the rear of the machine under the lid where the cable enters the cabinet The fixing point for the tops on these machines is either side at the f...

Страница 42: ...Machine Works section to narrow search for fault Door seal has mouldy black marks on it This occurs when the door is left closed after the washing has been removed in some cases this can be removed b...

Страница 43: ...ady has the required amount of water in it The most common cause is the pressure switch not resetting which could be the pressure chamber being blocked or a faulty switch The main problem here is not...

Страница 44: ...ch via the pressure pipe connection if they register the switch is OK if they don t replace it There could be a hole in the pressure pipe or it has come off or the most common reason is the pressure c...

Страница 45: ...t would cause the drum to hit the cabinet sides or base during use Drum lopsided Here is another case of the stabilizer legs not doing there job for whatever reason Check the pins are still in place a...

Страница 46: ...witch and associated connections Motor Common Faults Flashing Lights Flashing lights Area Referred to What to check Final Spin Out of balance load Re distribute load or add to it if only one item in m...

Страница 47: ...ut this lets you know the spin control is OK The second part of the set up will test the individual components Set dial to A and variable spin control to max then touch the start button The lights wil...

Страница 48: ...ht is flashing Pressure switch not maintaining circuit after fill Faulty pressure switch pressure hose leaking If the RINSE HOLD DOOR LOCKED lights are on and the END light is flashing Pressure switch...

Страница 49: ...inue flashing 4 Choose a component to test from the list below and select that letter on the dial then press the start button 5 The Rinse Hold Super Rinse will now light constantly to indicate the tes...

Страница 50: ...Home Repair Manuals Hotpoint WMA32 Dismantle Repair Page 50 of 50 Wiring Connections...

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