Heater fault

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Post by jblion on Thu Dec 06, 2018 8:24 am

Hi folks, after a bit of help/advice please.
My SX4 (2012) heater blows warm air only on the drivers side. Whatever controls are changed the passenger side blows only cold.
I have been under the dashboard and the actuators all seem to operate smoothly and respond to the controls. I have 2 fault codes B1504 (sunload sensor?) and B1551 (?).

Any advice/ideas gratefully received. Don't really want to let a dealer just get on with it without knowing where the cost will end.
Many thanks in anticipation,

John B.

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Post by Admin on Thu Dec 06, 2018 9:07 am

Does your SX4 have the seperate left and right temp control?
The sunload sensor fault seems to be on most Vitara/S-cross if read with a non Suzuki scanner and does not affect the auto light switching

Karl
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Post by jblion on Thu Dec 06, 2018 9:21 am

Hi Karl,

No it's one control which adjusts the temperature for both sides

John B

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Post by Gar Green on Thu Dec 06, 2018 11:19 am

Had this exact problem last week with an SX4. Left baffled by it. Actuator 95651-63J00 seemed to be at fault but didn’t cure it. Currently scratching our heads.
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Post by jblion on Thu Dec 06, 2018 11:34 am

My instinct would have been an actuator, unless I've missed one, mine seem ok too. How many actuators are there on the SX4, just in case I've overlooked something.

Thank you

John B

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Post by Admin on Thu Dec 06, 2018 11:35 am

The part Gar lists above (same as Swift) is listed on Suzuki GB's eBay shop so suggests they could be a common problem.....

https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.co.uk%2Fulk%2Fitm%2F183014439838

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Post by Gar Green on Thu Dec 06, 2018 11:50 am

X3 in total I think. Ones for recirculating air and 2 either side of the heater unit, one for direction and a mixer
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Post by Gar Green on Thu Dec 06, 2018 11:53 am

I have a spare actuator available if you want to go down that route.
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Post by jblion on Thu Dec 06, 2018 12:36 pm

I may have missed one then, though if I have its on the drivers side. Better crawl in again. Ouch!

I will look for the third one. Air is blowing everywhere so the direction seems ok. The drivers side heat is not as high as normal, so could be the mixer, though would have thought at least some heat would get on the passenger side?

It's a puzzler for sure.

Appreciate your advice gents, thanks for sharing it.

John B


Last edited by jblion on Thu Dec 06, 2018 12:37 pm; edited 1 time in total (Reason for editing : Missed word)

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