Heater issues citroen synergie/evasion

[DJSteve]

Hello everyone. New member here and i am startin with a question im not even sure anyone will be able to help with due to how rare the vehicle i have now seems to be.

Ill apologise in advance for the wording in this post im just trying to get as much info in as possible

I have a 2002 citroen synergie with the 2.0hdi engine(110)

The car runs mostly ok for the moment but thats not the major issue im worried about currently.

The in car heater does not work at all. The fan works fine but it is always blowing cold air. Car sits at running temperature happily and does not overheat etc. As far as i can reach to the heater hoses both seem to be hot going into the matrix also.

Also this car appears to have what looks like a webasto deisel heater which has got water pipes going into it and makes a hell of a racket when running.

Anyone got any ideas where i can next look for a possible fix

[myglaren]

Just conjecture at this stage as I know nothing of Synergies but a lot of PSA vehicles have servo controlled flaps the control the amount of hot air admitted to the cabin and others that direct the flow - My C5s are/were like this.
The gears on the motors are prone to stripping, sometimes due to the flaps becoming distorted with the heat of the incoming air.

If you fiddle with the temperature controls you may be able to hear the motors running to try and operate the flaps.

Welcome to the FCF

[DJSteve]

Thanks for the reply. Yes i also have a suspicion on the heater mix motor but im not certain where abouts in the dash it is to check it

[GiveMeABreak]

Post up or PM your VIN and I'll have a look for you

[DJSteve]

Vin number is VF7**************[VIN obfuscated, can be read by forum staff] hope thats i fo you need.

Thanks

[ken newbold]

They have two blower motors but not sure how many "stepper/servo's there are, certainly one for the direction and one for the heat output. Fairly easy to get at and replace. Mine occasionaly sticks from cold so I change the heat from hot to cold, wait a mo then put pack on heat, sometimes you can hear the motor running as it winds the flap open.

[DJSteve]

Ok whereabouts is it for the heater flap servo. The blowers seem fine. But no matter how many times i move from hot to cold it doesn ever move haha

[white exec]

Just wondered whether someone made a faff of things when they fitted the Webasto, especially if it's plumbed into the waterworks . . . Just a thought.

[DJSteve]

The webasto seems to run sometimes but im not entirely sure what exactly its meant to do etc. I know from what i have read that the synergie/evasion/806 etc could have the webasto fitted but dont k ow any further info

[ken newbold]

I've not come across one on an EV1 but would have thought it would come on automatically below certain tempeatures

[DJSteve]

I do kno it seems to power up generally when ignition is on but other than that i cant find any info or wiring diagrams for it

[ken newbold]

I had one on the 807, you could certainly smell it when it was running.

[ken newbold]

There's a guy on our facebook page breaking a Hdi at the moment, might be good for spares if you need owt

[white exec]

If it's plumbed into the coolant system, it should (I guess) be circulating hot water round the engine block and cabin heater (which are in parallel, and circulated by the engine water pump), to pre-warm them. The normal engine thermostat will prevent the hot water from being lost through the main radiator - unless the Webasto is capable/set to a temperature higher than the 'stat opening temp. The Webasto will also have its own circulation pump, to operate when the engine is off, and it is on. It's probably this pump that has gone noisy.

If you download a copy of the Webasto's user guide/installation instructions from their site, it might help check things out. Always possible to switch it off, I suppose.

Check, too, that the normal engine thermostat is present and working ok. If stuck open or not there, cabin heater will run chilly.

[DJSteve]

If it's plumbed into the coolant system, it should (I guess) be circulating hot water round the engine block and cabin heater (which are in parallel), to pre-warm them. The normal engine thermostat will prevent the hot water from being lost through the main radiator - unless the Webasto is capable/set to a temperature higher than the 'stat opening temp.

If you download a copy of the Webasto's user guide/installation instructions from their site, it might help check things out. Always possible to switch it off, I suppose.

Check, too, that the normal engine thermostat is present and working ok. If stuck open or not there, cabin heater will run chilly.

Engine takes a sensible time to get to what i class as running temp (bout 2 small notches below the middle of the guage) and sits their without issue so i think stat is fine. Ill see if i can get a hand on the coolant pipes to heater and webasto to check for temp next time i get 5 mins haha.