puggy Posted December 14, 2019 Share Posted December 14, 2019 Car only blows warm air when the heater is on the hottest setting. It is warm enough to warm the car if that makes sense just not hot as you would expect. Blows cold when on cold setting. Thermostat maybe? Any ideas? Link to comment Share on other sites More sharing options...
trevorc Posted December 14, 2019 Share Posted December 14, 2019 I had a crack in an ac pipe so it couldn't cool the air but it could heat still Link to comment Share on other sites More sharing options...
shaky Posted December 14, 2019 Share Posted December 14, 2019 Heater matrix might need a flush , or your Thermostat might need changing Link to comment Share on other sites More sharing options...
trevorc Posted December 14, 2019 Share Posted December 14, 2019 sorry misread first post Link to comment Share on other sites More sharing options...
j_jza80 Posted December 14, 2019 Share Posted December 14, 2019 Could be all sorts, but start with the simplest/ cheapest. Could be various things listed above, but could also be an issue with the HVAC controls or the heater box diverter flaps. Link to comment Share on other sites More sharing options...
mellonman Posted December 14, 2019 Share Posted December 14, 2019 First thing I would do is check your coolant level. Link to comment Share on other sites More sharing options...
puggy Posted December 14, 2019 Author Share Posted December 14, 2019 Coolant level is fine. I have a new thermostat kicking about so could try that I suppose. Link to comment Share on other sites More sharing options...
evinX Posted December 14, 2019 Share Posted December 14, 2019 My body does the same. Jokes aside could the heater control be packing in causing it? Dont really think a open thermostat would cause that as it depends on the controls allowing the heater unit to allow warm air to come into the cabin a faulty thermostat would show issues on the temp guage if its stuck i think. Link to comment Share on other sites More sharing options...
Scooter Posted December 15, 2019 Share Posted December 15, 2019 Find and feel (carefully)the in/out pipes of the heater matrix, they should be similar temperatures. Link to comment Share on other sites More sharing options...
Mo Reviews Posted December 15, 2019 Share Posted December 15, 2019 (edited) a faulty thermostat would show issues on the temp guage if its stuck i think. This. Dodgy matrix or HVAC controls would be my guesses. Edited December 15, 2019 by Mo Reviews (see edit history) Link to comment Share on other sites More sharing options...
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