Bosch Exxcel 1200 express timer

agentsmith

Bosch Exxcel 1200 express washing machine timer/controller appears to be failing - when a 40C wash is selected the cycle fails to move from wash to rinse/spin cycles and stays on wash cycle for programmed full time. When finished (check orignal program time to complete) I can manually select the 20min rinse cycle to finish rinse/sping cycle. If I leave the 40C wash on it runs for the 106mins full program time and then auto selects a 43min cycle which there is no program for?

Is this a timer/control issue - whats likley costs to repair?

If timer is it better to fix or replace as pretty much end of life for machine??

The Red Ace

it is more likely to be a heating issue, next time it is on check the door glass to see if its heating about 20 mins into cycle, also check the pump filter

agentsmith

Thanks for reply. Yes I had cleaned the pump filter (normally do this fairly frequently anyway) as part of first troubleshoot when noticed problem - found small coin and some scale/slime debris so cleaned all out and checked impeller - turned ok , but issue still present. I will need check later on glass heating 20min into cycle though.

Would you rule out timer/controller then? if heter issue how might you know if thermostat or element issue?

agentsmith

apparently washing machine did two 40C washes OK (completed cycle as normal) yesterday but one last night had same issue -stuck on wash cycle. When i checked glass it did not feel warm. Does this suggest heating element or ??

The Red Ace

if it is after doing two washes ok I would then rule out heating, then most likely a sticking pump impellar, they can run ok when empty but stick under load, if the impellar feel loose its worn, also check the sump and emptying hoses for blockages, sump hose is the one from tub to pump

agentsmith

Did more washes today ok so seems not heater. Maybe it's just me Will look into other suggestions over next few days.

Cheers

agentsmith

After observing for a while the washing machine seems to work more sporadically with same above issues on common daily wash @ 40C- fails to move from wash to rinse+spin cyles. All other aspects seem ok and when manually select rinse cycle after failing to complete a programed 40C wash , the wash completes ok. So given the age of the unit wondering if worth trying to replace heater element to fix issue (as suggested above) or bite bulltet and get new washing m/c. Dont want to throw 40-70euro (google) on element if not sure will fix problem only to have to in the end buy new. If confident able to fix gladly delay purchase for another day

Any thoughts?

The Red Ace

don't waste money on an element, ideally you need a meter to check the existing one, even with a meter you need to establish is it ok and then is it getting a supply when it goes into heat mode, its not unknown for the module to be at fault, sometimes the relay or a dry joint in there, as a diy job it is now getting more advanced.

agentsmith

just tested element with multi meter and showed 25.8 ohms resistance which i believe is within acceptable 20-50 range suggesting ok?? albeit on low side?. Also tested continuity and OK. Tested temp sensor and got 4k ohms - resistance dropped when held sensor which again believe suggests ok. No other apparent issues to my diy eye eg wires/connections etc

The Red Ace

to rule out a heating problem if your meter has amps facility unplug machine remove the lid and clamp either live or neutral on the feed in, then set for wash and when the machine is circa 5 mins into the wash cycle it should be pulling 8 to 9 amps when loaded, if not the board/module is faulty as you say the element is ok, be extremely careful when working on mains ac

agentsmith

Ok but will need get some aligator clips for meter. i take it you mean L/N connections in attached pic? meter only has 10amp max so maybe bit close to blowing fuse if 9amp reading? given current needs to be measured in line do you mean unhook say brown and connect to meter red line with other com to brown connector on washing m/c?

did a couple of 60C washes ok but had sulfide smell - suspect drain hose?

The Red Ace

assuming that you have the emptying hoses thoroughly checked for obstructions as previously mentioned you will have to determine if it is heating when in the wash mode because if not it cannot advance until it reaches the temp of the wash you have it set for, an amp meter with the facility to clamp around the live or neutral on the mains in will tell you if its heating or not when it is sticking in the cycle. If you watch your esb meter if it has the rotating disc type it will spin faster when the mains load increases.

thebeeb

A clamp meter is a safer meter to use instead of a standard multimeter. If the element is heating it will have a load of 8-10amps. As the element is metering ok, IF it isnt heating it means the main pcb isnt giving voltage to the element. There might be a bad soldering joint on one of the relays.

If it is heating, check the sump hose from the drum on the pump housing. Could be a cooler catcher or sock. If not, these machine a notorious for having a 1 cent coin or 2 cent coin caught on the pump housing where the drain house is attached.


As the element test is when the machine is on, i would recommend a professional to do the job. Better safe then sorry!!!!