Question about 2000 Chevrolet Astro

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Blower only coming from defrost and floor vents

Read your previous solution checked all my fuses could not find a blown fuse in compartment or under hood. any other possible causes.

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Damper is vacuum controlled, check for cracked vacuum line running from manifold to heater control box.

Posted on Aug 26, 2008


I had the same problem and yes there was a cracked vacuum line. The plastic lines get brittle and break, I replaced the whole line with rubber hosing.

Posted on Oct 30, 2008


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Why is there no power to blower motor?

It could be something as simple as a blown fuse or the blower speed switch is bad.

I would first check the fuse for power with the key on. Check both sides to make sure it's at least receiving power. You can use a cheap tester that lights up for the check.

IF the fuse checks OK then it's time to check the blower switch or make sure the heater selector isn't in the "OFF" position.

On some GM vehicle the heater control selector that lets you adjust from floor, to defrost, to dash vents, etc. has an "OFF" position when the selector is adjusted to the far left.

Without physically being there to actually look at it, these are the only suggestions I can come up with.

Hope this helps.

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I noted your question. You said that NOTHING is coming out of the VENT. Do you mean the interior vents normally for heat and air? Does air blow out of your dash defrost vent? Does blower motor work continuously? If so, I suggest that you check fuse panel at driver's door. If you have your owner's guide, look on pages 251 and 252. 251 shows your interior fuses. 252 shows description for Fuse #9 (10A). You have numerous 10A fuses. #9 is the lowest fuse perpendicular to Fuse #10 (15A). If it is blown, you have some sort of resistance in one of 4 things RUN BY THE FUSE. I went to my mechanic and he told me that the Blower Motor Control Resistor behind the glove compartment was bad. I replaced it (125 dollars) and it was not the problem. Check the fuse. Is it blown? Replace and the system may work normally. If it continues to blow please get back to me. If the system works after replacement, please respond.

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No air will come out of the vents when the ac or heat is turned on dodge 2007 ram 1500

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Feb 15, 2015 | Dodge Cars & Trucks

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Reason why A/C and heat does not blow through dashboard vents in center, it comes through defroster and floor vents only

it sounds as though the blower motor is shot.. that would be my guess if all the fuses are in check..have you checked the fuse box for a blown fuse for heat or a/c system? if they are fine then it would be the blower motor. fuses are easy and cheap enough to replace located usually in a compartment inside a vehicle side of dash open car door or under the dash remove panel and there will be a list of what the fuses control find the one that indicates heater or a/c and check for a blown fuse and if blown replace. hope this helps.

Dec 31, 2014 | 2005 Ford Escape XLT

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2002 ford explorer....Just changed the blower motor. Everything worked fine for a few days and now the air will only come out of the defrost and floor vent areas. When I turn the vent selector switch...

Check under dash in duct system for any vacuum hoses blown off then check under the hood on the passenger side of engine compartent.If all hoses are connected then you will have to check the heater blend door actuator and the heater blend door lever for proper operation.

Aug 04, 2011 | 2002 Ford Explorer

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Jan 16, 2011 | 1996 Mercedes-Benz C-Class

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No heat on the floor, only vents and defrost work. Why?

There should be a heater motor relay in the fuse box of the engine compartment. It is most likely blown out or needs cleaning. Check it, replace it and you should see it working again.

Jan 13, 2011 | 1997 Volvo 850

1 Answer

No heat and the defrost is the only place air will come out. Some time ago in the spring the a/c would not work then it started working but now the heat does not, and you get no get air flow from the vent...

Check fuse for blower motor, it is a 30amp fuse behind the plastic panel that is to the left of steering wheel, you must open the driver door, open up the fuse panel, I believe the 30amp is the only 30amp fuse in there, If it is blown replace it, then try the heat again. If nothing or fuse blows again, check the blower motor resistor. This is located under the glove compartment. Do a search on google if that is the case, I was able tofind a solution by putting in "blower motor resistor" ended up buying one for @ 30$.

Oct 06, 2009 | 2000 Dodge Intrepid

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The blower for the air condition & defrost is not working

You'll need to check all fuses under dash as well as under hood in fuse/relay box, as one may be blown. Then get back to us if you check them all & are good but still have problem.

Aug 24, 2009 | 1999 Jeep Grand Cherokee

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Defrost and floor wont blow air but vents work

these repairs are usually best left to an electromechanic but it can be doen by anyone with basic knowledge following the troubleshooting section in repair manual which can be purchase from local parts shop or online haynes or chiltons will do and get a multitester.

First check basics: are the fuses good to defrost blower? (fuse access refer to manual)
then see if there is power to the blower/defrost switch use multi meter at 20V setting
then see if there is power to blower unit under dash (see manual under interior section to access blower motor)
probe using same setting to test for power on each wire ( as you turn blower setting from low to high you shuld notice the voltagre climbs aswell)
if this checks out your blower motor is faulty replace and your good heres a few places to get the best deal on parts
Peach street autorecylcing 18003652341

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