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Topic: Luke-warm heat from blower (Read 1134 times) |
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ekim168
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Luke-warm heat from blower
« on: Jan 29th, 2011, 4:10pm » |
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Hi all again, noticed that the heater is only producing luke-warm heat, have tried the CC reset and topped up the coolant but still no joy, any ideas?
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Jonnycab
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Former owner of 2.3 Ultima Facelift saloon
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Re: Luke-warm heat from blower
« Reply #1 on: Jan 29th, 2011, 4:14pm » |
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Are the in & out pipes from the heater matrix both hot ?.....If the outlet is cold or cooler than the in, then sounds like a possible matrix blockage  ..... Or you may be lucky & the matrix could just have an airlock 
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ekim168
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Re: Luke-warm heat from blower
« Reply #2 on: Jan 29th, 2011, 7:09pm » |
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will check those pipes tomorrow, if it is an air lock how can i clear it?
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Mike H
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Renault Clio
 
Posts: 2594
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Re: Luke-warm heat from blower
« Reply #3 on: Jan 30th, 2011, 1:44pm » |
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May seem like a silly question, what's the coolant level in the header tank? Only 'cause it came up recently if it's down to the bottom or less, heater output tends to be down as well. Also may not be any good just looking through the side 'cause what looks like the level is actually a stain, need to take the cap off and look in.
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Mike H
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Simmo
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Re: Luke-warm heat from blower
« Reply #4 on: Jan 30th, 2011, 3:48pm » |
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The header tank should have clear markings on the inner edge of both minimum and maximum. Look at the front of the tank near the air intake pipes.
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Mike H
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Renault Clio
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Re: Luke-warm heat from blower
« Reply #5 on: Jan 31st, 2011, 3:23pm » |
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Yes I know, but it's useless if there's a brown stain up to where the correct level is supposed to be! It "hides" the actual water content 
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Mike H
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Simmo
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Re: Luke-warm heat from blower
« Reply #6 on: Jan 31st, 2011, 5:15pm » |
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If it's that bad why not take it right off. Plug the outlet and put some warm water and bleach in there. That should remove the 'stains'. 
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Mike H
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Renault Clio
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Re: Luke-warm heat from blower
« Reply #7 on: Feb 11th, 2011, 5:43pm » |
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Ta for the suggestion, when I get five minures or several
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Mike H
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Glyn
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Now an OAP ! 95 cossie and another !and a 12v
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Re: Luke-warm heat from blower
« Reply #8 on: Feb 14th, 2011, 2:23pm » |
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Had same problem. Had to flush matrix and no massive improvement until 3 weeks later when the airlock finally cleared. Now great, air temps of 60c regularly warm at last !!
Glyn
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Marcello
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Re: Luke-warm heat from blower
« Reply #9 on: Feb 20th, 2011, 10:23am » |
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I'm having the same trouble with mine. Just had the engine out so took the opportunity to check the matrix while I was at it, and everything is fine and there are no blockages. I tried the cc reset before I took the engine out and still having the same issues.
Any ideas?
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Tompion
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1997 2.3 Ultima estate.
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Re: Luke-warm heat from blower
« Reply #10 on: Feb 20th, 2011, 11:21am » |
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How do you know the matrix is OK?
Unfortunately free flowing water from a hose pipe through the matrix isn’t a good indication of its efficiency.
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Marcello
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Re: Luke-warm heat from blower
« Reply #11 on: Feb 20th, 2011, 12:56pm » |
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I drew the conclusion it was okay as I removed it and could see no visible issues of wear/cracks etc. I figured if engine is out, the dash can come out as well seeing as I had to reroute wiring for the autobox and also replace the plastic wood trim facia and stereo.
Also, I noticed, it's not consisantly luke warm. Occassionally it did blow hotter, but not very often.
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Tompion
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1997 2.3 Ultima estate.
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Re: Luke-warm heat from blower
« Reply #12 on: Feb 20th, 2011, 1:13pm » |
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I’d have changed it having got that far. There’s no way of checking it visually, they have plastic spirals inside that break up, flushing might/might not work – just depends what’s going on inside.
Here's one cut open the blockage you can see in the waterway at the bottom 3rd from the right is compacted plastic (which means in this instance scale remover wouldn’t shift it).
Of course this may not be your problem, does the engine get up to temperature - needle on the gauge horizontal?
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Marcello
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Re: Luke-warm heat from blower
« Reply #13 on: Feb 20th, 2011, 3:59pm » |
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Thanks for the pic. To answer your question, car comes up to temperature a treat and sits bang on half way on the guage.
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Tompion
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1997 2.3 Ultima estate.
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Re: Luke-warm heat from blower
« Reply #14 on: Feb 20th, 2011, 4:26pm » |
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Do both the pipes to/from the matrix get really hot, testing by hand you shouldn’t be able to detect any difference in temperature.
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L6ENY
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Re: Luke-warm heat from blower
« Reply #15 on: Feb 21st, 2011, 9:57am » |
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Had the same problem with my 24v, previous owner had done all the resets and flushing still nothing, when I bought the car it was in the summer so never checked the heater, winter came no heat, most members said matrix and thats what I thought but befor I went to the expense of having this done tried putting some non bio washing powder in the header tank(two large cups) run the car for about two weeks still nothing coming through, flushed the system bingo heat the sludge that came out was unreal  been working perfect ever since, HTH It worked for me Cheers Len
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ernie
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Re: Luke-warm heat from blower
« Reply #16 on: Feb 22nd, 2011, 10:41am » |
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Were the pipes disconnected recently for any reason. They have to be the right way round. Also I came across a car a while back, both pipes getting nice and hot but water just had a Chanel from one pipe to the other, rest of matrix solid with sludge.
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Tompion
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1997 2.3 Ultima estate.
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Re: Luke-warm heat from blower
« Reply #17 on: Feb 22nd, 2011, 2:03pm » |
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Yes, both hot proves nothing either way. One cooler to the touch shows a problem.
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Malcolm73
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Re: Luke-warm heat from blower
« Reply #18 on: Feb 22nd, 2011, 3:39pm » |
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I have previously posted my vain attempts at clearing a heater matrix on my Scorpio 24v ultima.. I disconnected the two rubber hoses and using 15mm domestic copper pipe and flexible hose extensions I pumped hot radiator flushing agents forwards and by revering the pump backwards. Negligible debris cam out although the liquids became slightly discoloured.. The flushing agents moved into the bucket reservoir at a very high rate, as fast as if connected to the cold water main. Any initial improvement was short lived and a new matrix had to be fitted. The old matrix was blocked by disintegrating plastic from the spirals as shown in Tompion’s earlier photograph. From this situation a new matrix is apparently the only solution.
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L6ENY
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Re: Luke-warm heat from blower
« Reply #19 on: Feb 22nd, 2011, 4:28pm » |
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Quite agree no amount of flushing will cure a collapsed matrix, but in my case it worked so always worth a try maybe I should change my name to lucky Len.
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