Zanussi tc7103w condenser dryer-water tank light keeps coming on when tank is empty or nearly empty-have found small plastic float and spring on floor behind dryer-where do they fit?

It can be mechanical or electrical malfunction. I would check tank microswitch, float and lever.
Below is explained how the condensate drainage system works and that will facilitate fault detection.

The warm and cold air circuits cross inside the heat exchanger, which results in a thermal exchange which condenses the humidity contained in the warm air. The condensation which forms in the heat exchanger is collected in a sump, from which it falls by gravity into a tank. When the water in the tank reaches the max. level, the level of the water in the sump increases, which causes the float to move upwards, thus actioning a microswitch; The microswitch for dryers with electronic board sends a signal to the electronic circuit when the tank has been filled, switches off the appliance and lights a pilot lamp which indicates to the user that the tank is full. The microswitch with electromechanical control switches off the dryer (the timer motor is powered and ends its cycle) and lights a pilot lamp which indicates to the user that the tank is full.

Dado

hi ime not sure but some dryers have a small tank inside at bottom with a float maybe float is stuck or if it has a pump maybe not working will have one if water tank is at top of dryer

Make sure lint build up is clear behind condenser

Pat, Have you found a solution to this yet? I have got exactly the same fault today ! Having taken the top & left side of the dryer off, I found what looks like a broken drive belt - not the main drum drivebelt which is fine, but a shorter one (about 18cm diameter loop) with no obvious place for it to have come from. Any clues would be appreciated. Dave ([email protected])

I had a similar problem. There is a 'o' ring on the plastic part that keeps coming out. This 'o' ring is not big enough, you need to replace it with a thicker one, preferably one made from a harder material.

Fluff has blocked the drain hole into the water drawer.Try locating the hole and using a small bore plastic tube **** the debris out of the container.

its either going to be fluff in the float which you can get at by taken the side panel off .or its fluff in the valve behind the water tank

The problem is with the lower water tank float switch, it is stuck. Take off the right hand side panel (as you are facing the machine) at the bottom you will see a spring mechanism for the belt tension. Beside this there are 2 electrical connectors. Take them off and spray with wd40 or similar. Whilst off give the plastic box they fit 2 a light tap with a hammer to free the float switch. Reconnect and try. If this fails you can over-ride by leaving the left hand of the two plugs off. This will get your machine working but you will not have an indication as to when the water container needs emptying so you will need to remember.

there is a lint blockage between the water collection box and the pump

thermostat in door part no 1258406014 should do the job colin