Heater blowing cold on passenger side - Lexus IS200

[e36er]

As it says in the title, the heater always blows cold on the passenger side. Any ideas as to what this could be?

[mmcd87]

Sometimes a quick Google can help -

http://www.google.co.uk/#sclient=psy&hl=en&amp...

But more specifically -

http://www.lexusownersclub.co.uk/forum/index.php?s...