Heater intermittent problems

Non-Technical Nissan QashQai chat. Mk2
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IC99
Posts: 5
Joined: Thu Feb 11, 2021 12:44 pm
Qashqai Model: Mk.2 Qashqai - J11 (2013–2017)

Heater intermittent problems

Post by IC99 » Thu Feb 11, 2021 12:56 pm

Hi.

I’m hoping someone can assist me.
I have a Qashqai on a 67 plate.

2 days ago I noticed the heater became problematic and intermittent.

Heater would kick in and I would put to max volume to help clear the ice.

Worked fine and then I would reduce to 2 bars instead of 7 bars.

When I then tried to move up from 2 bars the display would indicate the increase but the fan would not increase.

Tried switching the blower off. Left for 5 mins and tried again.

Worked in exactly the same way as I described above.

Has anyone had this before or know what the fix is?

Many thanks for reading this as this is my first post.

Also. Thanks in advance for any replies I may receive.

Ian

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calnorth
Posts: 1924
Joined: Mon Feb 11, 2019 2:01 pm
Qashqai Model: Mk.2 Qashqai Facelift - J11b (2017–present)

Re: Heater intermittent problems

Post by calnorth » Thu Feb 11, 2021 2:23 pm

Does the fan goto full speed when you press Defog and which brings aircon ON
Mk2 Qashqai Facelift - J11b (2017–present)
1.6 Dig-T N-Connecta

IC99
Posts: 5
Joined: Thu Feb 11, 2021 12:44 pm
Qashqai Model: Mk.2 Qashqai - J11 (2013–2017)

Re: Heater intermittent problems

Post by IC99 » Thu Feb 11, 2021 2:41 pm

Hi. Thanks for the reply.

Yes it does.

fbgqashqai
Posts: 65
Joined: Wed Aug 30, 2017 9:41 am
Qashqai Model: Mk.2 Qashqai - J11 (2013–2017)

Re: Heater intermittent problems

Post by fbgqashqai » Thu Feb 11, 2021 3:25 pm

and what about the auto setting does that seem to provide variable fan speeds?
fbgqashai 2017 J11a N Connecta 1.5DCi in Silver

IC99
Posts: 5
Joined: Thu Feb 11, 2021 12:44 pm
Qashqai Model: Mk.2 Qashqai - J11 (2013–2017)

Re: Heater intermittent problems

Post by IC99 » Thu Feb 11, 2021 3:48 pm

Hi. Yes it does.

IC99
Posts: 5
Joined: Thu Feb 11, 2021 12:44 pm
Qashqai Model: Mk.2 Qashqai - J11 (2013–2017)

Re: Heater intermittent problems

Post by IC99 » Thu Feb 11, 2021 5:27 pm

Auto and Max both work.

However when you switch this off and try to adjust the fan speed down it does go down.

However when you try to increase the fan speed it does not.

User avatar
calnorth
Posts: 1924
Joined: Mon Feb 11, 2019 2:01 pm
Qashqai Model: Mk.2 Qashqai Facelift - J11b (2017–present)

Re: Heater intermittent problems

Post by calnorth » Fri Feb 12, 2021 9:26 am

From what you say that clears problems with both the fan motor (Blower) and its electronic controller (Power Transistor unit).

This leaves a possible problem with the A/C Controller Unit and communications to the Fan switch (buttons). This can only be tested with Nissans CONSULT tool. The A/C Controller has a number of sensor inputs. Its also possible that an error code exists (DTC) which would need a scanner/CONSULT to extract. No quick fix seems to be available.

It worries me...i have the same car
Mk2 Qashqai Facelift - J11b (2017–present)
1.6 Dig-T N-Connecta

IC99
Posts: 5
Joined: Thu Feb 11, 2021 12:44 pm
Qashqai Model: Mk.2 Qashqai - J11 (2013–2017)

Re: Heater intermittent problems

Post by IC99 » Fri Feb 12, 2021 2:17 pm

Thanks for the reply.
This sounds expensive..........

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