2004 Prius Basic 205k miles. No AC except when defrost is on. AC will not blow in automatic or manual control. But when switch on front defrost it blows cold air and I can hear the compressor turn on, cold air blows from the defrost vents. Can see bubbles in sight glass and have not observed either one of the fans in front of the radiator turn on.
View 1 Repliesa while back I had found and bookmarked a page here with info on how the dealer could program the A/C compressor to not be forced on when the front windshield defrost is on; but the page is now missing.
I want to disable the compressor being on during defog because it causes the air to be extremely dry and causes severe problems with my asthma; and as soon as I turn it off or switch to normal foot/front vents, all the water that had condensed on the A/C coil then spews out and fogs up the entire car badly. It's a vicious cycle that is dangerous.
2008 Prius 115,000 miles
Purchased 2 years ago @ 78,000 miles
My rear defrost stopped working at some point towards the end of last winter. I recently started to need it again with fall weather in Pennsylvania. I was able to find the fuse for it. I replaced it and that did not solve the problem. I took off the trim around the rear hatch window to make sure all the connections were solid and they were. Also the grid seems intact, I don't see any breaks in the defroster lines. The rear view mirror defrosters work whenever I hit the button to turn on the rear defrost.
At this point I am considering changing the rear defrost relay. I think it is located next to the fuse ...
Need to find vacuum hoses, a/c is stuck on defrost.
View 1 RepliesI have a Gen II problem with my air conditioning. The air conditioning works; however, the air is stuck blowing in the defrost setting. I think there is some problem with the Air Mix Servo. In my non Prius cars they called the part a blend door actuator. Long story short, the air will not move to the front vents or anywhere else. That said, I can't hear the servo moving at all.
View 1 RepliesWhen I turn on windshield defogger no air coming to defrost windshield. Air is coming fine from other vents. Is there a fuse I need to check or some other issue?
View 19 RepliesI've got a couple different problems. The first one is that no matter what setting I have it on, air only blows out of the defrost vent.. Why this is happening? or is there already a thread about this? i saw a thread for this same problem, but it was for 2nd gen explorers.
The second problem I have is that there always seems to be air blowing from some where on the passenger side, unless i am accelerating. I can't seem to find where it is coming from but it makes a really annoying noise.
It is the 4.6L, AWD. not sure if that matters or not though.
So my defrost works and my floor works but when i put my heater on defrost/floor mix it only comes out in the floor not the windshield.
View 9 Repliesis there an way to remove the defrost vent covers? i think my license slid down the front of the defrost covers. its probably somewhere down under the dash. I would like to start removing the covers up top before I yank the dash. I am 1400 miles from home so I cant run and get a replacement.
View 6 RepliesI have an 06 F-150, there is lots of heat but it only blows on defrost. Is this the blend door motor or is it something else?
View 6 RepliesI have a 2004 Ford Escape 3.0 V6 FWD, and the air conditioning has been blowing only to defrost for a few weeks now. After many searches online, most sources seem to agree it is a vacuum leak, as the selector switch is vacuum driven if you want anything except defrost. I popped the hood and within one minute I found one open vacuum line that looks like it has been worn in two.
The line in question goes from the vacuum canister towards the passenger side of the firewall, then goes to a T connector, then a line (the one that is broken) continues towards the heater core lines to where the break in the line is. I found a picture online of what it should look like, but I am having trouble accessing the line that goes through the firewall and behind the glove compartment. I am pretty sure this vacuum line continues through the firewall between the two heater lines, but after that I am stumped.
I popped the glove box down out of the way and I see two thin vacuum lines and a small metal "can" nearby. The black line goes from a fitting and into the A/C bundle, and the white line goes from the top of the metal canister and down into the same bundle. My main question is which line controls the AC selector, and how do I pass a replacement line through that part of the firewall to make a good connection, as it seems the break is at the firewall itself with no extra sticking out for me to connect to.
My AC blows hot air, like heater hot, but the defrost on cold blows cold air. At first the AC would cut out at low rpm's (stop sign or red light) and cut back on, now its nothing. But the defrost blowing cold, enough to fog up the windshield, tells me its not the compressor or freon.
View 2 RepliesEven though my climate control system is not in auto mode, it still has a mind of its own. When I run my a/c, the airflow intensity level changes, and the system switches to defrost about every 5 minutes or so (even when there is absolutely no need for defrost). I continually have to set the system back to my comfort level. What causes this, and how do I fix it?
View 13 RepliesI'm headed north in a couple days to the frigid regions of the country and I little worried cause my blower fan is now completely non-functioning (no heat, no defrost ). It came on a couple times since I bought it recently, usually after hitting a bump and stayed on for a while, but now it hasn't come on at all in a while. I checked all the fuses, they all looked good.
View 16 RepliesI thought I wouldn't have need of the defrost for several months yet, but today we had unusually cold rain and my windows soon fogged up. The fan (not a/c) was already running at a very low setting (one or two clicks only) when I depressed the defrost button. Roughly 15 seconds later, it was like a hurricane in the cabin! The fan moved to the highest setting all by itself. This did clear the windshield in seconds, but it was a bit disconcerting. This phenomenon repeated itself all three times that I engaged the defrost button. Is the defrost supposed to do that? I swear, the sudden change startled me so much, I hit my head on the ceiling of the cabin...
View 3 RepliesWhether in heat or AC mode and any dial position, I'm not getting nearly enough air blowing out of the vents to cool or heat the cabin in a timely manner. The fan switch is working in all positions but I have to use high speed all the time to get enough air to defrost the windshield. I've also noticed that when defrost is selected, air only comes out on the inside part of the vents, not the outside. Is there a cabin filter on this truck, I've checked auto parts stores and they don't list anything for it.
View 2 RepliesMy father has a 04 f350 crew with heated mirrors. It does not have rear window defrost. The mirrors will not defrost, So I checked fuse panel under dash and no bad fuses. We don't have a owners manual so we weren't sure which fuse was for mirrors. What should we check next??? I tried searching forum but couldn't find much about the testing of the mirrors.
View 13 RepliesIt's winter here in the northeast and for some reason all of the windows in the car including the windshield do not defrost. The rear window is fine but none of the windows defrost. I've tried everything and cannot find a solution except driving with the windows down. Is this a common issue or is there anything i can do to fix thiss?
View 7 RepliesWent to use my windshield defrost this morning on my way to work. everything went fine. Leaving work I selected the face vents with my AC on and it only blows hard from the windshield vent even though its already been depressed.
View 4 RepliesPulling the RV the AC will slowly vent to defrost when the engine is under load and then return to normal when back to normal cruising.. Obviously it's a vacuum problem. Where do I start looking or what is usually the root of the problem.
View 2 RepliesEvery time I turn my Ex off and start is again I have to turn my A/C completely off then hit the A/C and Recycle button to get air to blow out of the panel vents or it will automatically blow out of defrost vents no matter what setting it was on when I turned ignition off. Is there a blend door actuator/some sort of air diverter on these like my old Yukon XL had? On the Yukon the driver and passenger vents would blow hot and cold.
View 4 Replies