Blowers cutting out

[MickOxard]

Hey, qashqai 2017, don’t know if anyone else has the same problem, my blowers cut out but then try to work for a few seconds then cut out again. This also makes the lights dim as they try to work. Sometimes turning the engine off and on sorts it for a short while. It’s still getting hot though. It seems to happen a few minutes after I’ve set off so obviously when I took it to the garage it worked fine lol. Anyone else had this issue? Thanks in advance to anyone who replies.

[lewisbryant]

Sounds like the transistor module is faulty, also known as the resistor pack which is incorrect these days as a resistor pack is a set of resistors that restrict current flow to the blower motor and usually has 4 speeds. A transistor module has more than 4 speeds and controls the current by switching the ground on and off also known as pulse width modulation, if the module fails for some reason then it will go into a failsafe and stop blowing or reduce the fan speed to a specific speed. I've changed about 3 of these for the fault your describing.

[MickOxard]

Ah ok, are they expensive?

[samsw]

I had similar problem with my J11....it was covered under warranty...but on paperwork...price including Diagnostic to solve it??........£521.08

[calnorth]

If the Power Transistor Module self senses current draw (and can limit it) then it doesn't appear to be doing that now..where you experience changes in the lamp illumination. Thats a worry really and I would expect the related fuse to have prevented that power fluctuation.

It'll likely be a trial and error test of the motor and power transistor module...no error codes exist in diagnostics.

[Welshmale60]

I got this problem as well sometimes it works for 5 minutes then nothing