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Nissan Quest Heating / Cooling Problems

53 messages,  Last post on Dec 06, 2009 at 9:59 AM

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What is this discussion about? Nissan Quest, Mercury Villager, Heating / Cooling, Auto Repair, Electrical, Van

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#22 of 53 Re: No hot air coming out from the ceiling vents? [vinhphuc] by dtownfb Jan 10, 2008 (10:16 am)
Replying to: vinhphuc (Jan 07, 2008 9:41 am) Check your owner's manual but I think the hot air should come out from the floor vents and not the overhead vents. Replies to this message: steve_ (Jan 10, 2008 8:23 pm)
#23 of 53 Re: No hot air coming out from the ceiling vents? [dtownfb] by steve_ HOST Jan 10, 2008 (8:23 pm)
Replying to: dtownfb (Jan 10, 2008 10:16 am) I was going to say the same thing but mine's a '99 so was afraid Nissan may have changed the duct work or something. Only cold AC comes out of our roof vents.   Steve, visiting host
#24 of 53 Re: Villiager heating problem - van is cold [adam07] by rick_wally Jan 16, 2008 (12:39 pm)
Replying to: adam07 (Feb 20, 2007 8:32 pm) park it with the nose as high as you can get it them fill it. this one is tough to get the air out of. when it blows cold it is always low on coolant, my 97 did this.
#25 of 53 heating fan wont turn off by chalukes Jan 21, 2008 (1:11 pm)
Ihave an 06 quest yesterday i turned it on and now it wont stop blowing air .its not heating or cooling unless i turn nob to on Replies to this message: dtownfb (Jan 23, 2008 10:40 am)
#26 of 53 Re: heating fan wont turn off [chalukes] by dtownfb Jan 23, 2008 (10:40 am)
Replying to: chalukes (Jan 21, 2008 1:11 pm) How much air is coming out of the vents? I've noticed that if you do have the air directed to the vents (ones on the dashboard), you may feel a little bit of air even though the know is set to "0". Try switching the direction of the air to the floor. At least you won't feel it.
#27 of 53 Re: 97 Villager dual A/C reset code [46ts] by dp33 Feb 07, 2008 (11:31 pm)
Replying to: 46ts (Jan 03, 2008 8:19 am) i don't know the answer to your problem however, if you have a full service gas station nearby that does mechanical work, he will probably be online with a company called alldata, this service is for auto repair shops and will provide the same schematics and troubleshooting codes as the dealerships, and these places charge a lot less money, good luck
#28 of 53 Re: 2007 Nissan Quest AC Problem [ob1] by ob1 May 27, 2008 (6:55 pm)
Replying to: ob1 (Aug 09, 2007 8:23 pm) All,   It happened again.....It was in the low 90's here and all of the sudden our front AC just cut out while on a local freeway. Would not start back until I turned the ignition off and on again. Took it to the dealer and of course they could not replicate the problem. They re-charged our cooling system and all seemed well except the other day it did it again for about 2 seconds and came back again......Additionally the other day my auto up drivers window would not stay up.....would go all the way up and then roll down about 4 inches.....of course the next day all seemed well.....apparently our Quest is posessed and wants to make a fool out of me everytime I take it into the dealership.
#29 of 53 Quest/Villager - Hot air only by motonation May 28, 2008 (6:39 pm)
Replying to: ovalleskids (Jan 02, 2008 11:49 am) I've found the problem, and the cure.   Our '97 Quest started doing this last year (a/c on, warm/hot air up front, cold in back). It was very intermittent, and often a little "love tap" on the dash got it working again, and when it did blow cold again, it was almost instant from hot to cold, leading me to believe it was electrical - not mechanical - in nature. It didn't happen very often, so we made it through the rest of 2007 with only occasional problems.   Fast forward to Feb 2008. Problem exists all the time - nothing but full heat out of the front unit, back works fine. A/C has no effect - heat all the time.   Still thinking I was dealing with an electrical issue, I grabbed my father-in-laws HVAC controller from his '97 Villager and installed it in our Quest. It worked great - temperature could be controlled, and I had cool air UP FRONT. To prove my point, I installed our Quest unit in his Villager and went for a drive. HOT AIR ONLY UP FRONT!! AHA! Its the controller - NOT a vacuum line, valve, etc.   Back into the garage, I disassembled the HVAC controller and could not find anything wrong - no burned areas, etc. Bummer. But I got to looking closer at the wiring coming off the back of the temperature selector knob - the connector was attached, but it was loose and could be moved around very easily. There was no real way to tighten it any more, so I unplugged it, applied some dielectric grease ($.99 at the auto parts store) to the connector, plugged it back in, and crossed my fingers.   A few minutes later I had the controller back in our still hot-engined Quest. The engine hadn't been running five seconds and I knew the problem was fixed - cool air immediately, and as I turned the temp control knob, I could instantly hear the system cycle from one setting to the other. Problem fixed!   After driving our van for a few thousand miles since that day, I can say with 100% certainty that the loose connector (all wires not making contact) is what fixed our problem. Although this may not be everyone's fix, it is easy enough to try - just 30 minutes of your time, and a dollar bill for the grease.   Here's some pictures of this, let me know if anyone wants hi-res versions or more info. Quest HVAC   Oh, and let me add one more thing. This did not happen on our original HVAC controller, but rather a new unit that I purchased and installed 2 years ago because our original unit (200k on it at the time) literally fried itself. We had smoke inside the van when it failed electrically. The new unit worked fine for about a year before the hot air only problem started, so it wasn't old age, but rather a poor design or poor assembly of the new unit - which seems to be common on these "old" vans.   Best, MotoNation Replies to this message: taddman (Jun 10, 2008 8:22 am) aj4611 (Jun 15, 2008 5:41 pm) motonation (Jun 20, 2008 4:24 am) aj4611 (Jun 20, 2008 5:10 am) and 1 more...
#30 of 53 Re: Quest/Villager - Hot air only [motonation] by taddman Jun 10, 2008 (8:22 am)
Replying to: motonation (May 28, 2008 6:39 pm) My wife has a 97 mercury villager nautica with the problem of no cold ac in front, but cold ac in back. So I took out the hvac controller. Thanks for the pictures in your post. Ours is digital control, not a knob and was not able to do the dielectric grease fix that you noted.   So I put it all back together and made sure all connections were snug.   Next I filled up the freon, and I noticed that the compressor kicked on and the back was cold, but the front was cooler, but not cold.   So we headed up to AutoZone and I purchased more freon with a clear tube so I could see what was going in. This one was called sub zero with hose 15oz. I figured that I would go old school and have my wife sit inside the van while I filled it up and let me know if the cold air was coming out the front vents.   Note: the other freon refill bottle I used came with guage, but I think that guage was faulty as it said my system was full.   After filling up with the sub zero with hose (hose is clear) 15oz, the front ac is ice cold now.   ....   In your case it had to be the connection to the hvac controller since you swapped the unit and came up with the same problem in the other van with that unit.   In my case..... it was a simple matter of filling it up.   The important and good news is ... it works now.
#31 of 53 ^^^^ by motonation Jun 10, 2008 (6:17 pm)
Great to hear you fixed it. Mine is still ice cold...which is great news since its been 100 degrees the last few days.

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