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Heating system problem! Sign up here! Search this forum this category all forums for All words Any words Whole Phrase (search options) Auto Repair Home>> Automotive Repair>> AC Auto Repair Help Forum comprehensive12345 New User Dec 3, 2009, 2:53 PM Post #1 of 4 (2098 views) Heating system problem! Sign In   1994 Dodge Caravan 3.0 L engine 279 000 km. Heater is giving out heat but should be much better! Heater blows out cool air when idling. When driving it puts out heat but it should be much better! What have I already done? A new winter thermostat has been installed. The air flow from the fan is strong. The line into the heating core is hot to touch. The outline is also hot. antifreeze is circulating properly. Any common problems to dodge I have not checked yet? Hammer Time Ultimate Carjunky / Moderator Dec 3, 2009, 4:10 PM Post #2 of 4 (2083 views) Re: Heating system problem! Sign In Please define what a "winter thermostat" is. With the engine at full operating temp, locate the 2 heater hoses where they go into the firewall and feel them to see if they are both hot to the touch. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional. comprehensive12345 New User Dec 4, 2009, 12:11 PM Post #3 of 4 (2071 views) Re: Heating system problem! Sign In winter thermostat is 195 degrees f. Hoses on both sides of heater core are hot to touch. Hammer Time Ultimate Carjunky / Moderator Dec 4, 2009, 12:59 PM Post #4 of 4 (2065 views) Re: Heating system problem! Sign In There is no such thing as a "winter thermostat". That vehicle requires a 195 stat year round and will have computer/mixture issues if anything else is installed. Since both heater hoses are hot, you can eliminate anything to do with the coolant, although I have my doubts about that being accurate since racing the engine increases the temp. The heat in that vehicle is controlled by a blend door that regulates heated air flow. it is operated by an electric motor/actuator. The problem can be that the actuator is stripped or inoperative or the door itself could be damaged. This is what needs to be determined by examining the actuator and see if it is responding to heat change commands or not. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.   Automotive Repair     Auto Body Repair and Refinishing     Heating or AC Issues     Electrical and Wiring     Brake Systems     Car Stereo Repair Advice     General Discussions     Car Making Funny Noises     Engine Fault Codes     Engine Troubles     Exhaust Systems     Steering and Suspension     Transmission Troubles     Tricks of the Trade Automotive World     General Discussions     Antique Car Talk     Car Shows and Events     The Bargin Bin     Motor Vehicle Inspection     Car Care Tips     Traffic Tickets     Gasoline, Motor Oils, Concept Cars and Engines     Auto Insurance, Financing, Leases, Warranties Truck Repair     General Discussions     Truck Engine Repair     Truck Suspension Repair Motorcycle Repair     General Discussions     Motorcycle Engine Repair CarJunky     Open Posting     Board FAQ's     New Board Suggestions

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