Hi,

Got the car back after the transmission work had to have done. Runs great, so smooth, shifts great.

Now that I've had a couple of days with it, I've had a chance to get to know the car. Seems the climate control blows only hot air. Pressing the direction buttons, I can hear servos operating flaps and the air changes where it's coming from, so I know at least that part works, but the temp up/down doesn't seem to have an effect on the air coming out of the vents.

Something stuck maybe? Looking for a good place to start.

Thanks!

 

Hi it well be the main switch dashboard control unit or the water control valve under the bonnet / hood near the radiator

 

Start by checking the fuse to the climate control valve. You might find it blown (Meaning the electronic solenoids cannot get charge to close) hence they stay open giving you full heat.

If the fuse is blown your going to need to ohm test the DCCV and ensure the electrical connector is actually connected to the valve.

Or you might find the DCCV is stuck open (if fuse is good) which means you need to replace it. (Buy Motorcraft YG-355 unit, you'll thank me later) stay away from $50 units. Not a job you'll want to do twice!

If DCCV checks out odds are your ACCM (climate control module) took a dump but in my experience with this (and after my recent issue I think I might be the 00-02 S Type climate control/DCCV authority) my money is on your DCCV having an issue.

 

What about a 2003 V6 having the same issue? Would you still say that it is the DCCV or the ACCM or the A/C compressor?

 

For 03 plus vehicles - is it nav or not? Nav ACCM's are more prone to failure but I'd start with the DCCV...

 

It's not navigation. On a side note, can I refit nav into car off I found the unit and parts?

 

Start with the DCCV then and it is possible to retro fit bit you need a complete donor car, time and lots of $ (at the end of the day not worth it...)

 

Thanks. DCCV will be a project in about a month. Retrofit will not happen. How easy are the aftermarket units to install? I should probably start a new thread.

 

My money is on that valve also.

Both ours had that issue, and simply, hahahaha, replacing that valve restored sensibility to the system.

 

The DCCV is NOT a nice task in anyones language.

Soooooo,

About 5 hours the first time, the 2 mounting screws will drive to drink.

You will need,

Alcohol, lots of it.
Language, the rougher the better.
Sense of humour, just because.

I got my valves from Coventry West, and picked them up in Vegas, good excuse for a trip, even from here.

I have done 6 of them now, and 2 hours tops.

 

I wonder if there is any coolant system lube that might keep them from sticking.. water pump lube maybe?

 

Not really. There's rubber stoppers in the DCCV and it disintegrates with age/heat cooling cycles. The particles get stuck in the solenoids and gums them up.

Just my novice feedback after pulling my failed DCCV apart that was stuck in the closed position, both solenoids.

 

Looks to be very much the same Bosch valve used on some BMWs. (Where they also fail!)

 

I used a Ford Motorcraft DCCV cataloged for the Lincoln LS (part YG-355 I think) so far holding up real good.

 

The one I got said Bosch on it as well. Reckon they just get 'em made the cheapest they can?