Question about Cars & Trucks
Could be a heater core valve sticking and bypassing the heater core. You will need a diagram showing the coolant path to find the valve if it is indeed that issue. Also, if you switch the controls to defrost, does it blow hot air (after the car has warmed up to operating temperature) on the windshield? If so then your problem is with the control flaps under the dash which most likely is a vacuum to the control flap issue.
Posted on Nov 24, 2014
Testimonial: "Switch it from floor to defrost still has cold air. My son said he tapped under the pass side and heat kicked on. I didn,t have same luck."
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Posted on Jan 02, 2017
1. Check the level you filled the coolant to...If you overfilled it this will happen. 2. Did you add the correctly diluted antifreeze? 3. Check to be sure the radiator is unobstructed
Posted on Jun 14, 2008
First thing first, turn off the engine wait for 15 - 20 mints, open the radiator cap and fill it up to the top then start the engine and see if it needs more water adn add as needed, then wait till you ca see the water circulating in the radiator now instead of corculating if it starts boiling out shut the engine replace the thermostat and do the whole thing again.
unless there is water in the engine the gauge will not be able to show the actual temp of the engine, so always malke sure you have water / antifreeze
Posted on Nov 15, 2008
SOURCE: i want to flush the heater core
Take off the hoses at the bulkhead/firewall that go to te heater core, use a garden hose and back flush the core by forcing water through the smaller of the 2 hose nipples, if the water runs right through then you have a heater air temp control door actuator problem
Posted on Dec 24, 2008
A code P0135 may mean that one or more of the following has happened:
= O2 Heater element resistance is high
= Internal short or open in the heater element = O2 heater circuit wiring high resistance = open or short to ground in the wire harness.
What to do; = Repair short or open or high resistance in wiring harness or harness connectors.
= Replace oxygen sensor (cannot repair open or short that occurs internally to sensor)
A code P0141 may mean that one or more of the following has happened:
Same as above: mentioned in P0135.
What do do is the same as above, so i am leaning towards and faulty wire harness since you have replaced both O2 sensors. Make sure the wire harness has no break in it or crushed connection clips. The other thing to look for is a bad fuse that is used to heat up the O2 sensor. It may not say O2 sensor on it, it may piggy back off something else so check all the fuse and make sure the O2 has a good ground and not corroded. Good luck and hope this helps.
Posted on Jun 25, 2009
If electric fans are coming on, and you have filled the system with the heater turned on high to purge it of air, even though you flushed it, I'd have the radiator flow tested (even when flushing, coolant tends to go around internal blockages, limiting its ability to work correctly) otherwise you need to begin testing from square one like you had never seen it before (don;'t assume anything you did is working) Pressure testing of coolant system, hydrocarbon test at fill opening and engine compression tests are important as well as what I mentioned above.
Posted on Jul 16, 2009
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