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With the vehicle cold, check your coolant level and fill it up it it is low. Start with your heater hoses. Check to see if one hose is hotter than the other. If so, then you have a bad or malfunctioning heater control valve (if equipped) or a bad heater core. If the vehicle never gets up to operating temperature, your should change your thermostat.
Does your heater blow out hot air? If you get plenty of heat even at idle (after the engine is warm) then you probably have a temperature sensor issue. If you don't get plenty of heat you either have low coolant or a thermostat issue. Check the level of your coolant when the engine is cold, it should be at the cold fill level that is marked on the resovoir. If it at the correct level, check for flow in the rad if it has a cap. DON'T OPEN IT WHEN THE ENGINE IS HOT!!!! Open if before you start the engine. Watch for the coolant moving through the rad, also (with the cap on and engine hot) both rad hoses, one should be a little cooler than the other. If they are both cool you have restriction in the cooling system. Hopes this helps, I am a former Ford master technician. If you need more help put a new question in Help me, Billy along with an email and I'll contact you with help.
CHECK FOR LOW COOLANT,NOT ENOUGH COOLANT IN THE SYSTEM.IF COOLANT LEVEL OKAY.THERMOSTAT NEED CHANGING STUCK OPEN.IF THERMOSTAT BEEN REPLACED.CHECK BOTH BOTH RADIATOR HOSES AND HEATER CORES HOSES THEY ALL SHOULD BE VERY HOT.IF ALL HOSES HOT AND BOTH HEATER CORES HOSES GOING INTO FIREWALL IS HOT.HEATER DOOR NOT OPEN ALL THE WAY OR STUCK.IF ONE OF THE HEATER HOSES GOING INTO FIREWALL HOT AND OTHER HEATER HOSE COMING OUT OF FIREWALL NOT HOT.MORE LIKELY HEATER CORE PLUGGED NEED TO FLUSH OUT COOLING SYSTEM.FLUSH OUT COOLING SYSTEM IF NOT BEEN DONE IN A LONG WHILE.
The brown looking chiffon could be oil in the water. However, if you are sure the system is ok then I would check the actuator door motor on the heater and make sure it is allowing the heat into the car. Seems as if you have done as much as you can.
Check your coolant level. Especially after you drive it and it starts to cool down. You have air in the system and it needs to be purged. Sad to say but chrysler/ dodge are bad for this problem. Some times you have to remove the hose from the heater core spout to get it purge correctly. You have to do this while it is running. Randy
Find the two heater hoses going through the firewall to the heater core both need to be hot at operating temp. If both are hot the problem will be inside with the heater control. I only one heater hose is hot the problem will be the heater core. I am assuming you have bled all the air out of the cooling system.
Since your blower is working and it is a heat issue,thats where we'll
start,First thing is have you checked the coolant level in the radiator when
engine is cold,make sure it is filled to top,next verify you have coolant in
reserve ,Start your van and get it up to normal operation temperature,If your
heat gauge on the dash works correctly it should be 190 degrees,Now lift the
hood and locate the two heater hoses going into the heater assembly at the fire
wall,Both hoses should be hot to hold on to,if both are hot and no heat inside
your problem will be the blend air door in heater assembly. if neither hose
is that hot you need to replace the thermostat in the engine to get it up to 195
degrees. if one hose is hot and one is luke warm then the heater core is
blocked and to blame. hope this helps you.
Follow the lower radiator hose, it ends at the thermostat when you are done, be sure to bleed the air out of the cooling system. Fill it up and open the bleeder valve at the thermostat housing (12mm) fill the radiator until coolant comes out of it, then tighten it and fill the radiator up. Does the engine temp read cold also? The heater valve is located down low on the firewall with a heater hose going to it, be sure its operating with your temp cable.
You have air trapped in the system. If you have cold air, warm air, cold air from your heater, then it's air entrapment. Very common these days. Go to a shop that uses vacuum method to refill cooling system & that will purge air. Otherwise, you can try. Park uphill. cold engine - fill radiator to top with 50/50 mix of antifreeze. leave cap on but loose. fill reservior to 3/4 full. Turn heater to hot to allow coolant to flow through heater core. start engine, run at 1500 rpms until thermostat opens and upper hose is hot. tighten cap and let it cool down. after cool check level of reservoir. fill to top line on reservoir. it should **** coolant back into radiator as it cools down. repeat if still an issue.
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yes this is very likely the problem, have you check your cooling system is it rusty? if so the heater core is plugged, take the inlet and outlet hoses off the core at firewall and use a garden hose to clear it, then have the cooling system flushed if rusty.