Toyota sienna heater

I have a 2005 Toyota sienna that is having heating issues. The heat would only work on the driver side, not on the passenger or back areas. We later had a mechanic friend check & our water pump was broken & the radiator had a crack, in addition, a new thermostat was installed. We thought that was the issue, but No heat still. It does kinda work on the driver side, but is not really enough to defrost or keep u warm driving to work. So, I decided to pull the dash part thinking one of the flap doors in the heat box didn't work. I took the servo motors off & manually worked the flaps trying to see what happened. Same thing, heat only comes out driver side (not very warm), and not the rest of the van. All the flaps appeared to work fine. I touched the two alum hoses connected to heater core and they were hot. We also have an P0037 Oxygen sensor heater control circuit low - bank 1, sensor 2 code Autozone read for us. From what I have read, that is not associated.....But, What am I missing? This is my wife's vehicle, now mine until I get it fixed. Help! I want my car back!

5 Related Answers

Anonymous

1010 Answers
Posted on Jun 29, 2008

SOURCE: 1998 toyota heating problem

You need Freon gas.

Anonymous

1861 Answers
Posted on Jul 18, 2009

SOURCE: Power Passenger Sliding Door Not working -2005

While I cannot help yu with the repair, i CAN provide you with a number to call.

1-800-331-4331

This is the Toyota Customer Experience Center. Call them, and request ssistance. Sometimes, in cases just like yours, they extend assistance.

Kiri Amarakoon

290 Answers
Posted on Jan 18, 2010

SOURCE: No heat/defrost 01 corolla

Sounds like you have air trapped in the heater core when you flushed the heater core. loosen the upper most heater core hose and run the engine untill coolant seeps out. Wait until the coolant has reached running temperature.

richochet

1026 Answers
Posted on Feb 01, 2011

SOURCE: 1994 Toyota pickup / 4WD

you could try running engine and open top heater core hose highest point should bleed it fully, failing that look at manual should tell how much water is in system

Anonymous

1 Answer
Posted on Nov 28, 2011

SOURCE: 2007 corolla does not give off heat, blows cold.

Having same problem. Turn knob to full heat, it blows Luke warm to cold air. Cycle the knob a couple times and rev engine to 5 / 6 RPM and it starts blowing hot air.

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this car has 2 system.s (option) front and rear, are both bad?
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which one you have?
i see no cables. that leaves damper motors or vacuum servos.
a real tech tests the controls, first. if they are good
he look in the FSM for the damper motor tests.
its there. and he hot wires it and finds, bingo, its bad.
and replaces it. labor can hit hr on dash pulls. 8hrs. work.

find another mech.
the parts are sold at Toyota. look there , in the parts sections
see it, see those parts.? sure are... there.... need help looking ask.
the dampers are bad.
a real mech finds out which damper is bad
if its a motor , he buys a new damper motor at TOY. for $150
if its just a cable it fixes that...

it can be 3 things
1: control bad. even a blown fuse.
2: connection from 1 to 3
3: bad damper motor.

bad parts 4,5,6? (part 6, mode motor bad?)
http://www.trademotion.com/parts/2005/Toyota/Sienna/CE?siteid=214001&vehicleid=185020&diagram=8530070

FIRE HIM!

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