Blower only warm on one side?

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Blower only warm on one side?
Topic Started: Thu Nov 5, 2009 10:18 pm (86 Views)
newbie190	Thu Nov 5, 2009 10:18 pm Post #1
Newbie Posts: 6 Group: Members Member #4,825 Joined: November 3, 2009	Hi Guys, My blower only heats on the drivers side. The heat it produces here is minimal at best. I've read that "Duo valves" (i may be a million miles off the mark here) are known to have issues. Can anyone tell me where it is on my car? 1.8 petrol 190e (1992) Any other suggestions as to what could be wrong greatly appreciated also. Newbie.



Gary_b	Fri Nov 6, 2009 11:23 am Post #2
Ava' Banana... Posts: 360 Group: Members Member #2,734 Joined: June 6, 2008	Blocked matrix maybe?



alogaparaloga	Fri Nov 6, 2009 12:06 pm Post #3
crazy mind Posts: 606 Group: Members Member #2,419 Joined: March 14, 2008	The heater controls are vacuum operated. Possibly the vacuum pipe on the relevant side has been disconnected, or cracked.



newbie190	Fri Nov 6, 2009 6:40 pm Post #4
Newbie Posts: 6 Group: Members Member #4,825 Joined: November 3, 2009	alogaparaloga Fri Nov 6, 2009 12:06 pm The heater controls are vacuum operated. Possibly the vacuum pipe on the relevant side has been disconnected, or cracked. Can you give me an idea of where to look for the vacuum pipes please?



stwat	Fri Nov 6, 2009 11:31 pm Post #5
Moderator Posts: 12,411 Group: Moderator Member #28 Joined: November 11, 2005	When i had this problem on my old 2.0l it turned out to be a leaking heater matrix. after a while it started leaking into the passenger side front and rear foot wells through the heater ducts. I chucked some radweld in(i can just hear lots of people stirring in their seats and groaning LOL) and it cured the problem for years afterwards.



Richy190E	Fri Nov 6, 2009 11:35 pm Post #6
Sales Rep Posts: 1,824 Group: Members Member #1,387 Joined: June 9, 2007	groans



stwat	Fri Nov 6, 2009 11:36 pm Post #7
Moderator Posts: 12,411 Group: Moderator Member #28 Joined: November 11, 2005



kentronix	Sat Nov 7, 2009 12:24 am Post #8
Admin Posts: 16,348 Group: Admin Member #147 Joined: January 20, 2006	I agree in theory with the worry about radweld but it held my 2.6 for over 6 months before I changed it. The merc does have thin waterways which can get blocked but it worked for me. I think if the vacuum fails you tend to get hot all the time rather than only cold. Not 100% sure but thats the effect I had on my 2.0d. In fact I have the same on my w124 although I have no idea if its the same system.



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