[philipdjones]

Thanks very much for the advice and photos addressing this problem. My 2003 Highlander started showing heater problem symptoms about a month ago. I took it into Performance Lexus Toyota in St. Catharines on Thursday, January 10 and they quoted $1189 (parts and labour) plus tax for the repair!!! Told them I'd sleep on it but found this forum through the wonders of Google and two days later I have a fully functioning heater system again. (cost - $3.99 for a package of butt connectors)

This is definitely a design flaw that Toyota should address and I'm also very disappointed with my dealer's behaviour. They didn't pop the dash to troubleshoot the problem but they knew exactly what it was....a potentially lucrative payday for them.

Thanks again!!