staples230uk Posted February 9, 2012 Share Posted February 9, 2012 Having done numerous searches and not found anything as of yet (if there is a thread about this please direct me to it ) After my run to london for the LMM meet my heater regardless of temp setting is blowing cold air, and in this weather makes driving without a warm jacket on near impossible. Various suggestions have been heater matrix, flushing radiator, coolant issues. Now being a bit of an engine novice I'm not too sure where to go first. Suggestions please guys and girls! As mentioned above if I have missed a similar thread , just drop a link in and will go from there Quote Link to comment Share on other sites More sharing options...
stevie_b Posted February 9, 2012 Share Posted February 9, 2012 Did this fault develop suddenly? i.e. was the heater nice and warm, say, last week? If it is sudden then the most likely suspect is the flap that controls whether hot air flows into the cabin's air ducts or not. If it didn't develop suddenly, then it could be an old/tired heater matrix (flushing through *might* help), or possibly an airlock in the matrix. Quote Link to comment Share on other sites More sharing options...
staples230uk Posted February 9, 2012 Author Share Posted February 9, 2012 Yeah it was a sudden fault stevie. So I'm guessing that's a dash out job then and (excuse the inuendo) have a play about with the flaps (god that sounds horrific! sorry) Quote Link to comment Share on other sites More sharing options...
stevie_b Posted February 9, 2012 Share Posted February 9, 2012 Part of the dash comes out, but not all. Just the central bit IIRC. SteveC hada similar problem and found the solution, he made a good post about it a few years ago with photos. Quote Link to comment Share on other sites More sharing options...
AndrewOW Posted February 9, 2012 Share Posted February 9, 2012 Sticky thermostat? I know this sounds daft, but are you sure it's fully topped up with coolant and anti-freeze, as these cold temps cold be freezing the water? Quote Link to comment Share on other sites More sharing options...
stevie_b Posted February 9, 2012 Share Posted February 9, 2012 See here for the flap info: http://www.mkivsupra.net/vbb/showthread.php?49871-Heater-Maximum-Output-Temperature-Too-Low Quote Link to comment Share on other sites More sharing options...
staples230uk Posted February 9, 2012 Author Share Posted February 9, 2012 Sweet plenty of ideas to start me off will report back. Quote Link to comment Share on other sites More sharing options...
Dnk Posted February 9, 2012 Share Posted February 9, 2012 Make sure the control arm hasn't come off before you go taking the dash out along with a few other checks. If you have to replace the heater matrix then its the whole dash out to do it. Quote Link to comment Share on other sites More sharing options...
staples230uk Posted February 9, 2012 Author Share Posted February 9, 2012 Make sure the control arm hasn't come off before you go taking the dash out along with a few other checks. If you have to replace the heater matrix then its the whole dash out to do it. Just had a quick scan through the thread that stevie b has linked gonna go down that route first (on second page of linked thread) fingers crossed thats what it will be! Quote Link to comment Share on other sites More sharing options...
Dnk Posted February 9, 2012 Share Posted February 9, 2012 Just had a quick scan through the thread that stevie b has linked gonna go down that route first (on second page of linked thread) fingers crossed thats what it will be! Yep thats the chappy and will be a result if its that, good luck Check your coolant levels too incase you have an unoticed leak on the system other than a leaking matrix Quote Link to comment Share on other sites More sharing options...
staples230uk Posted February 9, 2012 Author Share Posted February 9, 2012 Yep thats the chappy and will be a result if its that, good luck Check your coolant levels too incase you have an unoticed leak on the system other than a leaking matrix Will do fingers crossed Quote Link to comment Share on other sites More sharing options...
Havard Posted February 9, 2012 Share Posted February 9, 2012 I noticed on our way back from the LMM meet that the heater was not getting as warm as it did in the summer. ie: When you set the temp at 20 degrees the air was warm coming through, now I have to set it at 25 to get warm air through and at 30 it's roasting. I am assuming that the control arm has moved from where it connects to the flap? It's suddenly changed so defo not heater matrix. Does the outside temperature affect the ability of the heater in the cabin at all? It was 2 degree outside and I have never used the car when it has been so cold outside. I was also doing about 80 Mph at the time. H. Quote Link to comment Share on other sites More sharing options...
staples230uk Posted February 9, 2012 Author Share Posted February 9, 2012 Well after defrosting the car today and hacking all the ice off my drive in the hope of getting her out tomorrow for a run, snow has hit hard again!!!! Hmmmmm was gonna get this sorted tomorrow for heated comforted DAMN YOU SNOW!!!! graaaaahhhhh!!!!! Quote Link to comment Share on other sites More sharing options...
dan294 Posted February 10, 2012 Share Posted February 10, 2012 Managed to fix my heater last night, after 18 months of Luke Warm air, it was just the flap control arm that had come off! I now have a working heater!! Quote Link to comment Share on other sites More sharing options...
AndrewOW Posted February 10, 2012 Share Posted February 10, 2012 Excellent news. Quote Link to comment Share on other sites More sharing options...
dan294 Posted February 10, 2012 Share Posted February 10, 2012 Excellent news. Certainly is Andrew! At least my little girl can travel to school with a bit of warmth! I was chuffed to bits when I finally got some decent heat! Well worth the people with heater problems checking first before a dash stripdown! Quote Link to comment Share on other sites More sharing options...
raz Posted February 10, 2012 Share Posted February 10, 2012 Hey guys I have had this problem for a long time and just managed to get it showin to Kenneth Brown from Hillington and he its either 2 problem with my supra not producing hot air, 1 heatermatrix or 2 need to check the valve hope i get this problem fixed in no time as its too cold out there Quote Link to comment Share on other sites More sharing options...
dan294 Posted February 10, 2012 Share Posted February 10, 2012 Hey guys I have had this problem for a long time and just managed to get it showin to Kenneth Brown from Hillington and he its either 2 problem with my supra not producing hot air, 1 heatermatrix or 2 need to check the valve hope i get this problem fixed in no time as its too cold out there Raz, easiest way to check is look up the side of the transmission tunnel in the passenger footwell and turn the heater control knob at the same time. The rod is about 15 cm's long so you can't miss it. When the heater knob is turned, 2 flaps should move, both connected to the rod. Or if it's in with Kenny Brown, as him to check that first. Kenny is a sound bloke so am sure he can sort it! I deal with him at work. Quote Link to comment Share on other sites More sharing options...
raz Posted February 10, 2012 Share Posted February 10, 2012 Thanks dan will try that right now the supra is at my place at the moment so I will see if i cant source the problem out if not then I will tell Kenneth to look into what you just said there Quote Link to comment Share on other sites More sharing options...
raz Posted February 10, 2012 Share Posted February 10, 2012 just checked it out bud and when I put it on it makes a loud blowing noise a could feel cold air flowing, what do you think it might be ?? Quote Link to comment Share on other sites More sharing options...
dan294 Posted February 10, 2012 Share Posted February 10, 2012 Try turning the heater temperature control one whilst looking under the glovebox in the coner nearest the transmission tunnel. When you turn the heater knob, not the fan control one, look under the dash and you should see 2 white cam type things move, connected by a silver rod. It's obvious when you see it, see the pictures on the second page of the previously mentioned thread: http://www.mkivsupra.net/vbb/showthread.php?49871-Heater-Maximum-Output-Temperature-Too-Low/page2 You'll spot it straight away! Hope that helps! Quote Link to comment Share on other sites More sharing options...
staples230uk Posted February 10, 2012 Author Share Posted February 10, 2012 Been out to brave the cold to see if this was the fault but no...... The silver rod is connected how it should be! Not a happy bunny today Quote Link to comment Share on other sites More sharing options...
stevie_b Posted February 10, 2012 Share Posted February 10, 2012 To properly eliminate it, try starting the engine (or putting the ignition to position 2) and moving the temperature dial through its entire range. Does the rod move? It should. The thermostat stciking open is a good suggestion too. Does the coolant temperature needle behave normally when driving the car, or is it stuck at the cold end? Quote Link to comment Share on other sites More sharing options...
staples230uk Posted February 10, 2012 Author Share Posted February 10, 2012 Hi Stevie. yeah the connecting rod is performing as it should and the cooland temp needle goes to temp. As the rod moves to close the flap when cold air is selected it makes like a double clicking noise, for about a second or so. Not too sure if that is normal but when the weather improves I might get the central dash panel out and have a good look. Quote Link to comment Share on other sites More sharing options...
suprasteve1979 Posted February 10, 2012 Share Posted February 10, 2012 Hi Stevie. yeah the connecting rod is performing as it should and the cooland temp needle goes to temp. As the rod moves to close the flap when cold air is selected it makes like a double clicking noise, for about a second or so. Not too sure if that is normal but when the weather improves I might get the central dash panel out and have a good look. Hi Staples, I am having exactly the same problem, been searching for months & months and I have read every post I can find, I have flushed matrix, fitted new thermostat, checked rods, and all is fine, a few weeks a go I had a nice 48 degrees with a temperature sensor in the vent, now I am lucky if I get 4 degrees, I am having another go tomorrow and will definately let you know if I find anything. Mine seems to work for a bit if I force water back into the matrix outlet pipe whilst running and then quickly put the pipe back on, but after a week of driving I loose all heat. Steve Quote Link to comment Share on other sites More sharing options...
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