Question about Mitsubishi Eclipse

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I;m pretty sure the temp. control valve is broke or stuck i only get cold air no heat at all i have checked the thermostat the heater core and the hoses they are all in perfect shape

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It may be a air pocket in the heatercore take the hoses off the core and run water threw it with a gardenhose then hook the hoses back up goodluck.

Posted on Jan 17, 2011

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Posted on Jan 02, 2017

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No heat cold air Mercury Sable 2001 3.0


Thermostat stuck open, low coolant level, stuck blend door or bad blend door actuator, or blogged heater core. Feel both hoses to the heater core. They should both be about the same temp. If one is hot and the other is cold, you have a clogged heater core. If both are hot, then the thermostat is working and you've got a blend air door/actuator problem. Actuator failure is pretty common on these. Remove the actuator and open the door by hand. If you get heat, replace the actuator

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2004 dodge intrepid 2.7l ......Heat works great while driving down the road but when stopped it blows cold?


The first thing you should do is make sure that you are not low in coolant as air can be introduced into the systemand cause circulation problems. If system is full, be sure that temperature gauge at normal operating temp is not fluctuating as there could be a thermostat problem. If that checks out okay, move onto check-in if the heater core may be plugged. To do this you must locate the 2 heater hoses that go into the firewall and feel the temperature of both of them with the heat turned on full. They sgould be around the same temp, if one is cold, that means the heater core is plugged up. Heater cores btw do not always need to be replaced if plugged, theu can be back flushed with pressurized water. Let me know if this helps good luck!

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No heat at idle or low rpm's on 2004 audi a4 1.8t quattro


have a radiator shop pressure bleed the coolant system to remove air trapped in the system ( probably in the heater core and not allowing full coolant flow all the time . Regardless of the air temp the thermostat will keep the coolant temp at approx. 85 degrees C. As to the cig socket check the fuse first . If the socket fails it will dead short. The little element in the knob bit are prone to burning out . Get a plug in for the lighter and attach a light across the wires (multi meter) turn on to accessories or run on the ignition switch and see if you have power Tests fuse and socket

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I have a 1992 toyota camry le with a 3.0 v6. I'm having an issue with the heating system. It blows somewhat of warm air and not hot air? The engine warms up to normal operating temp. Do i need to change...


I would start by checking the hoses at the heater core. One should be hot the other cooler but still pretty warm. If one is hot and 1 is a lot cooler you probably have a plugged heater core. You can also check to see if you hear the blend door slamming and check air temp change when you switch from full cold to full hot. If there isn't a clunk at full hot or cold the door might be stuck.

Nov 28, 2017 | 1992 Toyota Camry V6

2 Answers

Heater wont work


Could be the diverter valve. It's the one located near the firewall2_bing.gif in the engine bay. The valve is in-line on one of the two coolant hoses that run through the firewall2_bing.gif. Have a helper rotate the temperature knob back and forth, with the ignition turned on, and you watch to see if the valve is being adjusted. I'm guessing it isn't. Sometimes the cable pops off its perch, other times someting is broken on one end of it or the other. Plastic parts are often used in this assembly. Best of luck

Jan 31, 2010 | 1995 Toyota Tercel

3 Answers

My heater is not working in my 2001 honda civic. Is it my thermostat?


Does the heater blow cold air from the vents or do you mean the there is no airflow from the vents? cold air from the dash vents when the heater control valve is set fully hot could be an air pocket in the cooling system. The radiator sits slightly lower than the engine causing air pockets to get trapped in the engine when you replace the coolant. you'll have to purge the cooling system to restore flow to the heater core. No airflow (blower motor inop) this could be a bad blower motor transistor. pin test the blower motor circuit.

Jan 06, 2010 | 2001 Honda Civic

2 Answers

All i get from my heater is heat i cant turn the ac on, and when i turn off the heater it still blows hot air


Sounds like a stuck heater core valve. Find heater core valve. Under hood, find the two heater core hoses going into firewall. One of the hoses has a valve. Operate temperature control (full heat, then full cold) check that valve changes position. If not either replace valve or control system failure. Also, when temperature control in cold position, one hose should feel hot and the other cold. Temp fix: disable valve to close no heat or on heat.

Jul 10, 2009 | 1998 Dodge Ram 1500 4WD

2 Answers

1996 crown victoria has no heat


the temp blend door may not be rotating from the a/c evaporator to the heater core opening.

Could be the motor on the blend door or the temp control knob.

Do you have manual a/c or electronic temp control?

If it's the a/c door electronic actuator motor, it's on top of the plenum. Have to remove the instrument panel for access.

Hope it's the temp knob on the control head.

top one is the circuit you are looking at
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1 Answer

No heat


Hey jacob, there are a number of things that can be wrong, let's start w/ easy cheap ones...1st, the easiest one is low coolant. If the level is low, it won't circulate thru the heater core, so no heat. 2nd thermostat stuck open. If this happens, the engine won't reach peak operating temp, and again, no heat. Pretty easy to check, is your car running cold (or low normal range?) If the temp gauge shows it's warming up in 5 - 10 minutes of driving, and is in normal range, then it probably isn't the thermostat. 3rd dash control that you use to select heat setting is either vacuum controlled (no vacuum @ switch possibly) or thermostatically controlled (faulty control), both of these could result in no flow of coolant to heater core, 4th a plugged up heater core (rust and corrosion) preventing coolant from flowing thru heater core. Let me know how u make out.

Nov 29, 2008 | 1994 BMW 3 Series

1 Answer

Heater only blows warm air.


The hoses from your heater core should be very hot to the touch. Check the hoses going to the core from the water pump. It should be very hot. The return hose should also be very hot. Now check the hoses going to the core. If they are not the same temp, then your heater control valve is not working correctly or the vacuum is not working. At any rate, locate the vacuum line going to the heater valve. Remove the silver bar on the valve from the plastic plunger arm. You will have heat all the time now if it was only a vacuum problem. You can fix it later when it's warmer out. BTW a 200* thermostat will make your heater even hotter.

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