i removed heater hoses and can flush water through core in both directions. Fan works but blows cold or barely warm water. any ideas what problem may be. oh yea core is not leaking or fogging window.
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2002 Ford F-150 Question: Little or no heat, have flushed system, replaced thermostat.
Answer #1jethro29 December 04, 2012, 19:44Enthusiast
when you turn the knob,or move the lever to change from hot to cold or vice versa,do you here any noise from under the dash? this truck has blend doors which control the temp of air that you get.they are controlled by small electric motors called actuators. in is very common for those to fail on your particuliar year and make.
ReplyMacMac1963, December 07, 2012, 10:38Rookie
Thanks I will llisten to see if i can hear operating.
Answer #2pushrod December 04, 2012, 20:40Master
Check heater control valve for proper operation. That black thing in the heater hose near firewall with the vacuum hose hooked to it.
ReplyMacMac1963, December 07, 2012, 10:39Rookie
I will look and verify vacuum line hasn't been disconnected. What is best way to insure that it is working properly?
Replypushrod, December 07, 2012, 14:40Master
Toward the bottom of the valve is a lever you can see if it changes when switch temp. control.
If it doesn't move it can be moved by hand manually to see if heat works then. A helper is handy!
Answer #3Greg's Orange Auto (13627 Answers) , Orange, CA - (714) 361-9386globalhelper December 05, 2012, 06:23Master
agree with both posts 1 and 2