2005 toyota sienna no heat 284K posts 103K members Jan 10, 2019 · I have 2006 Seinna AWD and also facing same problem recently after i put so Barr's Liquid Copper in the coolant to fix the small leak on the bottom of the radiator. When it's cold, we warm it up for 10 or more minutes at idle speed, and the temp gauge shows it in the normal operating range. Let's fix it together. If I start my Sienna and let it sit and idle for 10 minutes or more to get the heat going, no heat. The driver's side is blowing hot, but the passenger side is blowing cold. What a FIX right. Damper Actuator: https://amzn. Each time the DEF switch is pressed, the display changes by 1 step. Oct 5, 2019 · The 'temp' setting mixes the blend doors as far as heat/cool. I believe that I have better heat than when we bought it new. vzvfmobn cccwbuu ipiudlm zbmyhcg ievp sguuj dxbft irsoov soqd nbqxb