Swift: Ventilation blower pumps in HOT air

k36 · 29th March 2007, 14:47

Hi Guys,
The blower is again giving hot air since 2-3 months, specially after driving for sometime. Last week I got the car serviced (3rd servicing) and asked them to look at this issue, but the service engineer as well as the AC specialist says there is no problem.

In response to my negative feedback on the service, the dealer today sent a technician to my place. He showed me that the hot/cold mixer flap as well as the fresh/recirculate air flap is working fine, and again said that this is normal. Finally he also showed me the ventilation fresh-air intake ports and guess what... they open into the engine bay

.... and that's the reason, according to the technician, of the hot air being blown as soon as the engine getting to operating temperature.

Guys... is this the case with other cars too? Isn't this a design fault that fresh air is being taken in from the engine bay... forcing us to use AC much more than really needed? Can't we run the cars in summer with windows closed and AC off even at night? (In Pune evening temperatures are quite moderate).

k36 · 18th April 2007, 13:35

Today I got another follow up call from the service station and the technician, who seemed to be knowledgeable, gave the reason for temperature increase even in recirculation mode. The explanation: The dashboard gets hot because of the sunlight in summer and this causes even recirculated air to become hot as the HVAC plumbing is just below the dashboard... making it hot too.

Solution? Try an insulating dashboard mat! Guys.. Is this a standard accessory? I need help in finding one for the Swift.

fine69 · 10th January 2011, 11:06

First winter with my Swift DDiS and this is what I noticed. Even if the AC is off when I move the temperature knob to Hot (Red) the blower starts throwing hot air and when it is moved to Cold (Blue) I start getting somewhat cool air.

Now it being 8-10 degrees when I'm driving I understand if the air feels cool when the knob is on Cold (blue) but how does one explain the hot air that I get without even turning the AC on. To add, the hot air is available even when I've just turned the engine on i.e. when the engine hasn't even heated up properly.

It is actually great that without having to turn the AC on I'm able to get hot air but hope its not a mechanical fault in my car.

Just to add I never turn the ventilation on i.e. the Fresh Air mode off is always off (light on) and still this happens

speedmiester · 10th January 2011, 11:18

It is not a mechanical fault. You don't need the AC to be on to get the hot air. The heater uses the engine heat to blow the hot air inside the cabin.

jigbarai · 10th January 2011, 11:20

^^
Air 'heater' works directly off the 'knob', and not the AC unit.
Meaning, yes - it will work when you have the AC button in 'off' position as well. It doesnt work off the 'engine heat' either. But I guess you need the engine started to have the heat, else it will just be the fan working.

It has nothing to do with ventilation.
Ventilation will just make it more effective (recirculating the same hot / cold air - whatever be the case).

fine69 · 10th January 2011, 11:23

But then why do we have the heater at all? I mean when would one want to turn on the AC and set the knob to hot?

29th March 2007, 14:47	#16
k36 BHPian Join Date: Dec 2005 Location: Pune Posts: 133 Thanked: 21 Times	Problem Reappears! Hi Guys, The blower is again giving hot air since 2-3 months, specially after driving for sometime. Last week I got the car serviced (3rd servicing) and asked them to look at this issue, but the service engineer as well as the AC specialist says there is no problem. In response to my negative feedback on the service, the dealer today sent a technician to my place. He showed me that the hot/cold mixer flap as well as the fresh/recirculate air flap is working fine, and again said that this is normal. Finally he also showed me the ventilation fresh-air intake ports and guess what... they open into the engine bay.... and that's the reason, according to the technician, of the hot air being blown as soon as the engine getting to operating temperature. Guys... is this the case with other cars too? Isn't this a design fault that fresh air is being taken in from the engine bay... forcing us to use AC much more than really needed? Can't we run the cars in summer with windows closed and AC off even at night? (In Pune evening temperatures are quite moderate).
	() Thanks

18th April 2007, 13:35	#17
k36 BHPian Join Date: Dec 2005 Location: Pune Posts: 133 Thanked: 21 Times	Today I got another follow up call from the service station and the technician, who seemed to be knowledgeable, gave the reason for temperature increase even in recirculation mode. The explanation: The dashboard gets hot because of the sunlight in summer and this causes even recirculated air to become hot as the HVAC plumbing is just below the dashboard... making it hot too. Solution? Try an insulating dashboard mat! Guys.. Is this a standard accessory? I need help in finding one for the Swift.
	() Thanks

10th January 2011, 11:06	#18
fine69 Senior - BHPian Join Date: Dec 2008 Location: New Delhi Posts: 1,591 Thanked: 1,467 Times	Re: Swift: Ventilation blower pumps in HOT air First winter with my Swift DDiS and this is what I noticed. Even if the AC is off when I move the temperature knob to Hot (Red) the blower starts throwing hot air and when it is moved to Cold (Blue) I start getting somewhat cool air. Now it being 8-10 degrees when I'm driving I understand if the air feels cool when the knob is on Cold (blue) but how does one explain the hot air that I get without even turning the AC on. To add, the hot air is available even when I've just turned the engine on i.e. when the engine hasn't even heated up properly. It is actually great that without having to turn the AC on I'm able to get hot air but hope its not a mechanical fault in my car. Just to add I never turn the ventilation on i.e. the Fresh Air mode off is always off (light on) and still this happens Last edited by fine69 : 10th January 2011 at 11:08.
	() Thanks

10th January 2011, 11:18	#19
speedmiester Senior - BHPian Join Date: Jul 2006 Location: bangalore Posts: 2,387 Thanked: 6,630 Times	Re: Swift: Ventilation blower pumps in HOT air It is not a mechanical fault. You don't need the AC to be on to get the hot air. The heater uses the engine heat to blow the hot air inside the cabin.
	() Thanks

10th January 2011, 11:20	#20
jigbarai BHPian Join Date: Sep 2009 Location: Mumbai Posts: 554 Thanked: 29 Times	Re: Swift: Ventilation blower pumps in HOT air ^^ Air 'heater' works directly off the 'knob', and not the AC unit. Meaning, yes - it will work when you have the AC button in 'off' position as well. It doesnt work off the 'engine heat' either. But I guess you need the engine started to have the heat, else it will just be the fan working. It has nothing to do with ventilation. Ventilation will just make it more effective (recirculating the same hot / cold air - whatever be the case).
	() Thanks

10th January 2011, 11:23	#21
fine69 Senior - BHPian Join Date: Dec 2008 Location: New Delhi Posts: 1,591 Thanked: 1,467 Times	Re: Swift: Ventilation blower pumps in HOT air But then why do we have the heater at all? I mean when would one want to turn on the AC and set the knob to hot?
	() Thanks