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Chris (aka-Moose)
Chris (aka-Moose), Auto Technician
Category: Toyota
Satisfied Customers: 947
Experience:  16 years of experience
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My 1997 Toyota Camry doesn't have hot air coming out of the

Customer Question

Hi my 1997 Toyota Camry doesn't have hot air coming out of the heater. It has the electronic heater control with A/C. Thanks very much. KP
JA: Have you checked the coolant level? Have you checked the hoses for leaks?
Customer: Hi, I've checked the coolant level - it was nearish the top but I put a liter in to fill it up. Checked all the hoses and they are fine.
JA: Are you fixing your Camry yourself? What have you tried so far?
Customer: Yes I am fixing it myself. I tried the heater when the car engine was up to temp on a long drive. With the control set to 32°C it puts out luke warm air. I located the two water pipes coming forward from he firewall. One has a mechanically operated water valve on it - and with the car running, I turn the heater temp from 20°C up to 32°C but this valve does not change position at all. I think it may be in the almost closed position. The mechanical wire goes through the firewall to the heater area inside the car.
JA: Anything else you want the mechanic to know before I connect you?
Customer: No that's all, thanks for your help so far.
Submitted: 1 month ago.
Category: Toyota
Expert:  david craig replied 1 month ago.

Hi Im David, thanks for visiting the site, thats the heater control valve. make sure the lever didnt come off. if not then replace the valve.

Customer: replied 1 month ago.
Hi the lever is still connected. When I disconnect the lever and operate the heater control valve by hand it is free to rotate. So I left the lever disconnected and then varied the heater temperature with the control from cold to hot and looked at the linkage wire to see if it moved, but it didn't. Does this appear to be a problem with the heater mechanism itself?
Expert:  david craig replied 1 month ago.

it sounds like the cable on the back of the control panel may have come loose

Expert:  david craig replied 1 month ago.

take a look at this bulletin

Customer: replied 1 month ago.
Hi, thanks for that info. My Camry doesn't have the mechanical cold/heat rotary dial, it has the electronic heat control with the digital display. Is there a servo that controls the heater cable>
Expert:  david craig replied 1 month ago.

ok, standby

Expert:  david craig replied 1 month ago.

4 or 6 cylinder?

Customer: replied 1 month ago.
4 cylinder, 2.2l
Expert:  david craig replied 1 month ago.

ok thanks

Expert:  david craig replied 1 month ago.

pull the panel out, and see if theres a cable there because according to the service manual that car wasnt supposed to come with automatic climate control

Customer: replied 1 month ago.
it does have Automatic climate control. I'm wondering what could have gone wrong that the cable is not modulating the heater control valve. Thanks.
Expert:  david craig replied 1 month ago.

pull the panel and take a look

Expert:  david craig replied 1 month ago.

hows it going?

Customer: replied 1 month ago.
Not bad thanks. I found the Heater shut-off valve in the water pipe was fairly stiff so have ordered another one. I traced the cable from this shut-off valve to the heater blend air servo. Removed the servo & checked the circuit board inside. All the components are working. Cleaned all the contacts & put it back together & plugged it in. It rotates now. So I just have to wait for the heater shut off valve. Thanks.
Expert:  david craig replied 1 month ago.

ok, but you said in one of your replies that it was free to rotate? that through me off a bit because that valve is almost always the issue.