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AC blowing only cool air... Heater not working

Posted: Sat May 04, 2013 6:11 pm
by murdoko
So today, I went to Sylvia park. Turned on the heater. I noticed that its not blowing hot air so I set the temperature to max (32 deg). It still blew cold air as if the temp is set to max cold. Anyone had any experience similar to this?

Re: AC blowing only cool air... Heater not working

Posted: Sun May 05, 2013 9:23 am
by Tofu
will be one of a few things..
- heater tap is jammed on cold
- heater core has an airlock in it or is blocked
- car has no coolant
- switch is broken

Re: AC blowing only cool air... Heater not working

Posted: Sun May 05, 2013 10:06 am
by archon
Not sure how the 110 does it (heater pipes head behind the engine and I couldn't see crap), but on my old JZZ30 there was a vsv which operates the heater tap - that stopped working and I ended up with cold air.

Re: AC blowing only cool air... Heater not working

Posted: Sun May 05, 2013 2:20 pm
by murdoko
Coolant level okay. I will check the switch coz that's easy. Will bleed the coolant when I have time. If all else fails, ill bring it to a specialist. Will keep this post updated for others. Thanks guys

Re: AC blowing only cool air... Heater not working

Posted: Wed May 08, 2013 9:05 am
by murdoko
Turned out to be the stepper motor (~$175 part) under the dash.... booyah!

Re: AC blowing only cool air... Heater not working

Posted: Wed May 08, 2013 2:01 pm
by archon
Is the heater tap under the dash as well? Or is that part of the stepper motor? Pics of broken parts?

Re: AC blowing only cool air... Heater not working

Posted: Thu May 09, 2013 8:06 am
by murdoko
heater tap is attached to the stepper motor under the dash. fairly easy to replace, just need to remove the glove box to get access. I'll take pics and post it here later