Bosch combi microwave – HBC84H501B/36 – cuts out after two mins

[twicknix]

The microwave is working as I can feel the air blowing through the cavity, it is heating up the water in the mug. Set it for 2mins and 10 secs, it runs through it fine and the timer ended then it died. Before the visit, I thought it would be the cooling fan but the fan is blowing through a I can feel warm air via the cavity.

After 5 mins, the power restored.

I am concerned that the microwave powered down completely and won’t switch on or anything until after 5 mins it came back on. Would it be the faulty module?

[twicknix]

I like to add to it, the fan oven is working and it does cut off after 5 mins. Seems that there is overheating issue in there somewhere but the fan is working and it is blowing through the cavity. The cavity I mean is the air vents on the top of the microwave not the actual internal box just to clarify.

[electrofix]

ok a little confused !!

the fan oven is working and it does cut off after 5 mins ?

meaning what .
you set it for 5 mins and it runs ok
or
you start the programme and it cuts out 5 mins in

sort of same with movrowave are you saying it runs for 2 mins and 10 secs then cuts out
or you set it for 2 min 10 sec ( odd time) and it runs ok but after the prog ends it cust out ??

Dave

[twicknix]

You are not the only one that is confused.

The fan oven works and reached temperature but according to the customer that it has a tendency to cut out halfway through cooking same goes for microwave that it cuts out after 2 mins or thereabouts.

While I was there, the appliance appears to have to powered down completely as in dead, no lights, nothing responding. This happened at the end of the timer on microwave although the customer says it happens halfway through the cooking of let say 4 mins cooking and powered down after around 2 mins. The oven was the same although it ran for more than 7 mins and I didn’t have time to sit it out so I turned the oven knob to off position then it powered down.

Which led me thinking there is a problem with the controller or thermostat? The cooling fan is working fine and I must stress that is from observational point of view as I did not open up to investigate further as I did not have anything to pinpoint since I got confused on the fault description like yourself.

[twicknix]

https://media3.bosch-home.com/Product_Shots/300×300/MCSA00847184_F2277_HBC84H501_481327_def.jpgJust give you the idea on what is looks like if I can describe it better – the light display goes blank, the left control knob doesn’t respond then few mins later power restored.

[electrofix]

have you checked for mains input when it goes off as it sounds like a bad supply

Dave

[twicknix]

I think the plan is to take it out and check the connections and the mains input and perhaps replace the 3 pin moulded plug for a new one to ensure good connections.

Thank you for the suggestion, Dave.

Matt

[Author]

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