Only heat setting 5 works

by **Redline280** » Tue Oct 28, 2008 6:50 pm

For some weird reason, my heat only works on the 5th setting so it's blasting out. About a week ago, the 4th setting was working as well but is now out. What could cause the first 4 to go out without causing the 5th one to go out as well? Thanks in advance.

by **ThatVietGuy** » Tue Oct 28, 2008 7:21 pm

Manual or automatic HVAC?

This could help: http://www.solaraguy.com/viewtopic.php? ... ight=speed

by **rt9101** » Thu Oct 30, 2008 3:41 pm

I'll assume manual. For the selector, there is a resistor that controls the 4 lower speeds, usually. Very simply this resistor has an open in it and the wire from full or 5, working off of its own circuit, doesn't. So the resistor is probably bad.

by **mazen222** » Fri Oct 31, 2008 8:11 am

http://solaraguy.com/viewtopic.php?t=41 ... hlight=fan

by **ThatVietGuy** » Fri Oct 31, 2008 12:09 pm

mazen222 wrote:http://solaraguy.com/viewtopic.php?t=41370&highlight=fan

Beat you to it, man :lol:

by **Redline280** » Sun Nov 02, 2008 11:54 am

Thanks for the replies guys. I know this probably sounds like a noob question, but how do I know what kind of HVAC I have? If it helps, I have a 2001 Solara, 4 cylinder engine, auto transmission. Thanks again.

by **ThatVietGuy** » Sun Nov 02, 2008 8:05 pm

You have a manual HVAC.

by **Redline280** » Sun Nov 02, 2008 9:05 pm

Alright, ill try getting a resistor and see if that does it. Thanks for your help guys.

by **Redline280** » Thu Nov 20, 2008 9:41 pm

I finally got around to replacing the blower motor resistor and all the heat settings finally work. It was actually a really easy fix. I am still having a problem though. The heat in the past month has been just barely warm and it is now very cold outside being winter lol. I noticed that my coolant is brown now. Could it be that the coolant just needs to be replaced? Any tips for doing this?

by **System_Crash** » Fri Nov 21, 2008 1:32 pm

If you're coolant is already brown, you're heater core might be stopped up with calcium deposits/sludge from old coolant or you could have a blent door problem or a hvac control problem
OR you're heater hose on/off (not sure what its called)

by **Redline280** » Sun Nov 23, 2008 6:42 pm

I finally figured it out. All it was was a green cable that was in the back of the heater unit. It had fallen out of the clip under the dash on the drivers side so I adjusted it and put it back in the clip. It works great now. I checked there because I remembered I had pulled the heater unit out awhile back to put new bulbs in there so I could see the heater controls at night. I Good thing it was something easy and free to fix.

Only heat setting 5 works

Only heat setting 5 works

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