AndrewOW Posted June 20, 2011 Share Posted June 20, 2011 I've had a weird little problem that's been getting worse over recent months, but as it's warmer at this time of year I hadn't noticed it. My heater is blowing cold air. When I twiddle the temp knob a few times, the heating then comes on, but not every time. I know this could be a really dumb question, but would it be a matter of replacing the heater control thingy, or can it lead to a much worse, and more complicated affair? I think the heater matrix is working, as I haven't had any leakages, or the dreaded soaking in the footwells just yet. Any advice would be appreciated. Quote Link to comment Share on other sites More sharing options...
stevie_b Posted June 20, 2011 Share Posted June 20, 2011 Check the link rod that controls the heater air flap. SteveC had an issue with this a while ago so search for his posts if you don't know what I'm talking about. Quote Link to comment Share on other sites More sharing options...
AndrewOW Posted June 20, 2011 Author Share Posted June 20, 2011 Funny you should say that, as I can hear a little motor trying to do something right behind the dash, which I assume could point towards it getting stuck, I assume. I'll have a look at both. Quote Link to comment Share on other sites More sharing options...
stevie_b Posted June 20, 2011 Share Posted June 20, 2011 (edited) Actually the motor you can hear is a good sign: it's at one end of the rod I'm talking about. The other end is a bit tricky to describe but it's somewhere behind the heater dash controls. My best guess at the moment is that your heater control knob is faulty. It's unlikely to need a new matrix I would think: knackered matrices either leak as you've described, or get clogged up slowly over time but still manage to put out a tiny bit of luke-warm air (especially with the fan turned to its lowest setting and heater setting to maximum heat). Edited June 20, 2011 by stevie_b (see edit history) Quote Link to comment Share on other sites More sharing options...
AndrewOW Posted June 20, 2011 Author Share Posted June 20, 2011 I hope it's the former! Thanks. I'll get it checked out. Quote Link to comment Share on other sites More sharing options...
Delboy52 Posted September 21, 2011 Share Posted September 21, 2011 Just noticed mine giving no heat then some heat... Balls Quote Link to comment Share on other sites More sharing options...
Scott Posted September 22, 2011 Share Posted September 22, 2011 Just clean it out with a hose Quote Link to comment Share on other sites More sharing options...
AndrewOW Posted December 13, 2011 Author Share Posted December 13, 2011 Update: Today my heater control unit decided to go off completely. I've checked the fuses, but they are all okay. The lights come on with the headlights that's no power to any of the controls including aircon and rear window heater. Does that mean that the control unit is knackered? I'm still getting heat out, but without the fan on. Luckily the temperature is around 22°, so I'm not freezing. Does anyone have a spare heater control unit that I could test. Preferably with the blue conversion. Quote Link to comment Share on other sites More sharing options...
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