another heater problem

nicnet · 11-21-2007, 11:37 PM

Burping was done on a really good incline, but not for hours (20 mins max), so it could be a possibility to try again.

I'm working on the theory that it's not the heater core - mainly on the basis that I can't face taking the whole dashboard out. Naive? Perhaps.

Got another working theory, suggested in a thread over on http://toyotaownersclub.com/
Could be worn out solder joints on the heater control panel.
Took it out this evening, and re-soldered all the joints (some of them were looking a bit sad).
Put it back in, and heating was working ok, at least for the short time I tried it.
That proves nothing yet though - I need to take it out for a longer run tomorrow.

If not working ,then I'll try a longer burp (excuse me!), and also look at this air mix control servo, as I still think that's a possibility.
If still no joy, then yes, I'll have to really consider the heater core itself.

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11-21-2007, 11:37 PM	#6
nicnet Stock Join Date: Oct 2007 Location: finland Posts: 7	Burping was done on a really good incline, but not for hours (20 mins max), so it could be a possibility to try again. I'm working on the theory that it's not the heater core - mainly on the basis that I can't face taking the whole dashboard out. Naive? Perhaps. Got another working theory, suggested in a thread over on http://toyotaownersclub.com/ Could be worn out solder joints on the heater control panel. Took it out this evening, and re-soldered all the joints (some of them were looking a bit sad). Put it back in, and heating was working ok, at least for the short time I tried it. That proves nothing yet though - I need to take it out for a longer run tomorrow. If not working ,then I'll try a longer burp (excuse me!), and also look at this air mix control servo, as I still think that's a possibility. If still no joy, then yes, I'll have to really consider the heater core itself.