My 2001 grand caravan only blows heater and a/c air at the maximum level the knob allows then barely blows air at the other 3 or 4 lower settings on the knob. I have no clue what would be the cause. Any ideas?
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
www.cargurus.com > Questions > Dodge > Grand Caravan CarGurusHeater has decided to blow cold air only - Antifreeze is topped up, problem started with intermittent ... Asked by hosehead Jan 02, 2011 at 10:25 AM about the Dodge GrandCaravan .... 1999 Dodge Dakota 2 Dr STD 4WD Standard Cab SB.
Start with checking coolant level, if low it will cause a no heat problem. If radiator coolant level is correct you might have a temperature door problem. The temerature door is located inside the HVAC module and is controlled by the temperature control knob on the dash board. The electric motor that moves the temp door may have failed.
generally if your heater blows cold air, three things can cause it.
1: very low coolant (anti-freeze) levels, your car would generally overheat tho if at those levels.
2: car HVAC systems have a fin inside which turns to allow either your hot or cold air to pass thru,
to check for this just turn your air con on high with the temp turned to hot, this will go cold if this is the case.
3: blown heater core. this is generally a costly repair on any car as they are generally installed midway thru assembly, so removing parts to gain access is a time consuming and difficult task.
All these issues are quite difficult to repair if you do not have the appropriate level of training. I would reccomend taking your car to your local mechanic. although due to the complexity of fixing a heater core ( usually you have to drain your A/C) this can be a very expensive repair.
i hope i have helped
You may have air trapped in the lines to or from the heater core.
If you (still) have a real radiator cap on the radiator, remove it with a cold engine, start and run the engine allowing it to warm up while watching the water/coolant level.
Make sure the heater control is set to its highest heat setting while doing this.
If it is trapped air, you may see it 'belch' after the engine is warm and the engine thermostat is open.
Refill as needed if this is the case.
It's more difficult without direct radiator access and may require several cycles of hot/cold to allow refilling through the overflow.
Have you checked the coolant level? What you describe is exactly what happens if the coolant level is low. When stopped at idle, hot coolant is not circulating through the heater core, so no heat. As the engine increases in rpm's when you pull away from the light, the water pump is spinning quicker, and some coolant is making it to the heater core. So check the level, and if it is low, keep an eye on it to see if it drops again. That of course indicates a leak somewhere. Get it fixed, as overheating the engine leads to costly repairs and worse case a new engine. Let me know how you make out with this.