1. Home
  2. Volvo automobiles
  3. S70 ECC/fan trouble.....

S70 ECC/fan trouble.....

Hi there,

S70 TD '99 with ECC. After starting the engine, the AC seems to start and the blower/fan (what do you call that in English??) starts up for 2 seconds (may be a bit less powerful than usual) than the fan quits and my ECC-switches show green/orange lights: failure. Fan won't function anymore. I DO get some hot or cold air (depending on the temp. setting) but without the fan it aint much of course. Appparently the AC itself is fine. Dealer checked it (read out the computer) and says: the blower/heating engine fails and has to be replaced.

Possibly true, but the strange part is that it DOES start up for a couple of seconds. Is it possible that something got stuck in the engine, so that it almost blocks, sucks up too much power and the computer decides to shut the whole operation down? Any other experiences with this?

Any suggestions appreciated. Thanks in advance,

Thijs Holland

Reply to
thijs
Loading thread data ...

It is likely the cabin temperature sensor is full of dirt This is causing fault code ECC-414, this code is wrongly labelled on the Volvo scan tool which describes a problem with the main blower.

Look to the left of the ECC control box you should see a small grill next to the heated rear screen switch.

Get a light and look inside, you will find it is full of dirt. There is a small fan in there to draw air over the sensor wire, this cannot turn because of the dirt and is causing the problem. The small fan only turns when the main fan does. Use a vacuum cleaner to clean out the dirt or remove the sensor and clean it. Do not poke things in there to clean it or you will break the sensor wire.

Reply to
OBD

When the system starts, it self checks. If the motor is drawing too much current for the voltage applied to it, then the control unit assumes the motor is going bad and shuts it down to save the fan controller. Chances are you have a bad heater motor, but it could be the controller as well.

Reply to
Mike F

That sounded great!!! Tried it straight away....it WAS dirty....but cleaning it didn't change anything....unfortunately.....thanks anyway - this is the type of know how I'm looking for!

"OBD" schreef in bericht news:417ec043$1 snipped-for-privacy@mk-nntp-2.news.uk.tiscali.com...

Reply to
thijs

MotorsForum website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.