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Car Forum / Driving, Maintenance, Tuning / Maintenance and Repair / December 2005Heater issue
Another question for the knowledgeable folks here... Our minivan has rear air and heat. The front heat works great, but the air coming through the rear vents is anywhere from cool to cold. (Yes, I've checked the a/c controls <G>) Any ideas on what could be causing this? (Oh, and markansas, do refrain from stalking me to my other newsgroups and harassing me over my posts in here. Thank you.) Nan You might have better luck with the year and make of the beast.... Is it electric or coolant run? Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's Canadian Off Road Trips Photos: Non members can still view! Aug./05 http://www.imagestation.com/album/index.html?id=2120343242 (More Off Road album links at bottom of the view page) > Another question for the knowledgeable folks here... > Our minivan has rear air and heat. The front heat works great, but [quoted text clipped - 7 lines] > > Nan >You might have better luck with the year and make of the beast.... Sorry, posting on the fly. It's a '93 Aerostar minivan >Is it electric or coolant run? I'm not sure. If the coolant is low the heater doesn't blow warm air, if that's any indication. Nan >>You might have better luck with the year and make of the beast.... > [quoted text clipped - 6 lines] > > Nan Hi Nan, Seems like your troubles aren't over just yet i guess.... I hope you wre able to get the last issue under control by now, oh and what was the problem anyway? (just wondering if anything I suggested worked) Now for your "new" problem.... I have a few questions first though and hope you might be able to answer them....Do you have sual controls for temperature? On mine, there are two controls, one for the driver, and one for the passenger. If you have dual control (and by the problem you are having, it certainly sounds llike it), the temperature for the rear would be the same as the one for the passenger side (in my case anyway). Yours may be front and rear....although it still maybe split up driver/passenger. If this is the case, then your problem is more than likely in the slider that controls the temperature for the passenger/rear. If you have a single temp control, then I am not sure what your problem would be, but having single temp control sounds odd for this situation. The temp sliders open and close valves that will allow coolant to flow thru the heater hose. It sounds like the temp control valve is sticking closed. To check this, you may want to look at the heater hose under the hood to find a cable like apparatus attached to a heater hose. This is the way the mechanical valves work, and i am not sure if your van has a newer style. In other words, when you push the slider control, the cable thats attached to the heater valve will move.... there may be something binding or you may find that it is hard to slide the temp control one way or another... Let me know if this helps....if not, I will look in my manual on the electronic heater valves.... Fwed > Hi Nan, Hi :-) > Seems like your troubles aren't over just yet i guess.... Well, since we only paid $200 for it, it's bound to have some issues. We're taking care of them as time and money allow. >I hope you wre >able to get the last issue under control by now, oh and what was the problem >anyway? (just wondering if anything I suggested worked) It was a bad starter. Tapping on the starter worked short term, but we decided to replace it a few weeks ago. It's real nice not to worry about it starting anymore! > Now for your "new" problem.... I have a few questions first though and >hope you might be able to answer them....Do you have sual controls for [quoted text clipped - 5 lines] >this is the case, then your problem is more than likely in the slider that >controls the temperature for the passenger/rear. We have dual fan controls, but a single temp control. The fan controls are knobs with 4 settings from low to high, and the temp control is a knob with graduated increase from cold to hot. I can turn the rear heat on and air blows out, but it's never warm air. We just noticed this recently, but I'm not sure it's ever worked properly. We've had the vehicle for a couple months and only recently really needed to run the heat. > If you have a single temp control, then I am not sure what your problem >would be, but having single temp control sounds odd for this situation. The [quoted text clipped - 6 lines] >the heater valve will move.... there may be something binding or you may >find that it is hard to slide the temp control one way or another... Hubby looked under the hood and found the heater hose, but didn't see anything that looked to be causing an issue. > Let me know if this helps....if not, I will look in my manual on the >electronic heater valves.... > >Fwed Nan >> Hi Nan, > [quoted text clipped - 61 lines] > > Nan Hmmmmmm..... I am wondering if both the fans speed controls works on all speeds?? Have you checked this?? If one of the fan speed controls do not, then there is a switch that will need to be replaced, if they do, then i will need to look at the manual to see.....Have you checked this?? I can't think of why you would have hot air in the front and not in the back if there is only one temp control.... could there be a control in the rear somewhere?? I will post something tomorrow if i happen to find something.... Fwed > Hmmmmmm..... I am wondering if both the fans speed controls works on >all speeds?? Have you checked this?? If one of the fan speed controls do [quoted text clipped - 6 lines] > >Fwed Thanks so much. There is a control pad for the rear driver's side passenger, with a vent nearby. Hubby was sure there is no temp control, only fan controls, but I'll double check when he's home from work. I'll also check the fan speeds for the rear. The speeds do work for the front. Nan > Hmmmmmm..... I am wondering if both the fans speed controls works on >all speeds?? Have you checked this?? If one of the fan speed controls do [quoted text clipped - 4 lines] >somewhere?? I will post something tomorrow if i happen to find >something.... Well, I looked everywhere and do not see another temp control, so I'm baffled. Nan > > Hmmmmmm..... I am wondering if both the fans speed controls works on > >all speeds?? Have you checked this?? If one of the fan speed controls do [quoted text clipped - 9 lines] > > Nan No one has still mentioned if it's coolant or electrically run. If it's coolant run, then I would suspect it's air locked. I would be looking on the heater in the back for a bleeder valve somewhere. Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's Canadian Off Road Trips Photos: Non members can still view! Aug./05 http://www.imagestation.com/album/index.html?id=2120343242 (More Off Road album links at bottom of the view page) >No one has still mentioned if it's coolant or electrically run. > >If it's coolant run, then I would suspect it's air locked. I would be >looking on the heater in the back for a bleeder valve somewhere. > >Mike Thanks, I'll mention this to hubby. How can we determine if it's coolant or electrically run? Nan > >No one has still mentioned if it's coolant or electrically run. > > [quoted text clipped - 7 lines] > > Nan A coolant run system will have heater hoses running back there. It uses engine heat just like the front heater. If not, then I would be looking for a fuse or breaker for the electric heater. Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's Canadian Off Road Trips Photos: Non members can still view! Aug./05 http://www.imagestation.com/album/index.html?id=2120343242 (More Off Road album links at bottom of the view page) >A coolant run system will have heater hoses running back there. It uses >engine heat just like the front heater. [quoted text clipped - 3 lines] > >Mike Okay, thanks for helping, Mike :-) Nan Nan... One other thought I had... and not sure if this is possible, but can you do a diagnostics on the vehicle to see what kind of error message(s) you are getting. It may tell you what is wrong with the heater, or it may only be good for engine trouble.... worth a try though huh?? Fwed >>A coolant run system will have heater hoses running back there. It uses >>engine heat just like the front heater. [quoted text clipped - 7 lines] > > Nan hey, you chickenshit crotch dropping think you are queen bitch MOOO BLOW ME!!! > Another question for the knowledgeable folks here... > Our minivan has rear air and heat. The front heat works great, but [quoted text clipped - 7 lines] > > Nan Hi Nan, sorry it took so long to get back to you on this, but i had to run alot of errands yesterday for the lil ones b-day party.... in any event.... i looked in my manual...its a 97 caravan so its probably a little different, but for the rear heat, the unit is located in the rear quarter panel of the vehicle. Who knows, yours might be in the left rear. there is a blower fan there and heater hoses. I think that since you only have one temperature control for both front and rear, something isn't working for the rear, and it probably has something to do with the heater hoses. On may be clogged or not letting enough through the hoses to keep the heat for the rear unit.... One thing you didn't mention is wether or not the fan speeds worked on all settings. I seem to remember you saying there were two separate blower controls, but one temp control. If the blower control isn't working in the rear on every speed, then you will need to replace the blower resistor for the rear. This might solve your problem all together, but only if all speeds aren't working...this is a simple fix, as it is a part thta basically plugs in to replace and its not really expensive either (about 30 bucks). if the blower for the rear does work on all speeds, then it sounds more like you have a flow problem in the hose somewhere... or again, a valve of some kind stuck partially open or shut... I don't have the manual for your particular model, so it is a bit hard for me to just tell you exactly whats wrong or how to fix it....do you know of a good mechanic?? Maybe you can ask him whats wrong if you tell him whats going on.... he might be able to just tell you... oh its this and then you will know what it is that needs fixing... then maybe someone here can help you decide if you can fix it yourself or not!! Fwed > Hi Nan, > > sorry it took so long to get back to you on this, but i had to run alot >of errands yesterday for the lil ones b-day party.... That's okay, I fully understand a busy life with little people :-) >in any event.... i >looked in my manual...its a 97 caravan so its probably a little different, [quoted text clipped - 20 lines] >you will know what it is that needs fixing... then maybe someone here can >help you decide if you can fix it yourself or not!! I'll let hubby know what you've said. I did notice last night when I turned on the real blower control, the speed decreased on the second notch, then went up to full speed on the next notches. I don't know it that's significant or not. Thanks for your help. I had no idea part of the heater system would be in a rear quarter panel. Nan >> Hi Nan, >> [quoted text clipped - 50 lines] > > Nan the fact that the blower slowed down when it should have increased in speed does say something..... Usually it will not work on certain speeds, or not work on one or more speeds if the resistor is no good. It sounds like it is looking for juice that isn't being provided, so what Mike says about checking a fuse makes sense. It could also be that you WILL need to replace the blower resistor soon or now even..... chances are you have one they are located one in the front and one in the back. In my particular case, the manual says if the rear blower reisistor is no good, it is not serviceable and that the rear blower motor would have to be replaced....ugh....hope that isn't your case....Maybe you can start with a quick fuse check to see if that is a problem.... Fwed |
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