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Car Forum / Oldsmobile Cars / February 20041988 Delta 88 heater/air cond. vents very little output
Hi, I bought a used 1988 Delta 88, and I can't get hardly any heat or A/C thru the vents. Even on the highest setting, air barely comes thru the vent. You have to put your hand about three inches away to feel the feeble output. It's also weak in defroster mode, but it seems a tad stronger than the vents. I had the blower motor replaced, still no better. The A/C works, the air feels cool if you put your hand very close to the vent, but there is just not enough force to really cool the car down to any real degree. I use the heat thru the defroster. Someone told me there may be a door or some kind of plate or damper behind the vents, and it could be in the shut position. Is there such a door, and as all the vents are very weak, must be one wide door across the whole length of the dash, or is this door furthur in the system? TIA. -- http://www.DoMeDanny.com alt email addy: dannykewl@yahoo.com A very common problem with full size GM cars of that era is plugged AC evaporaters. Moisture condenses on the evaporaters as they cool and they can remain moist after shutting the car off. A mold or fungus actually grows on them plugging the core. It looks like a thick mat stuck to it. You need to access the evaporater to clean it. Sometimes you cn see the evaporater from the hole the fan mounts into and clean it from there. I think GM actually has a cleaner they use specifically for this. Steve > Hi, I bought a used 1988 Delta 88, and I can't get hardly any heat or A/C > thru the vents. Even on the highest setting, air barely comes thru the vent. [quoted text clipped - 12 lines] > http://www.DoMeDanny.com > alt email addy: dannykewl@yahoo.com Thanks Steve, I'll get that looked at. Dan > A very common problem with full size GM cars of that era is plugged AC > evaporaters. Moisture condenses on the evaporaters as they cool and they [quoted text clipped - 23 lines] > > > > -- OK, I was told about the evaporator which I will get checked out, however someone else I know said there may also be a diversion or dispersion door or plate behind the vent housing. Does the Olds 88 have this, in addition to looking at the evaporator. TIA Dan > Hi, I bought a used 1988 Delta 88, and I can't get hardly any heat or A/C > thru the vents. Even on the highest setting, air barely comes thru the vent. [quoted text clipped - 10 lines] > > -- Pretty much all recent (30 years) heater systems use a diverter door system to control temp. Sometimes called a blend door it routes air either through the heater core or around it for less heat. That's what the temp control on your heater control does. But it won't stop the flow of air, which If I remember correctly was your original complaint. A malfunction may cause the air to flow cold, or hot, but not stop it. I will almost guarantee your problem is the plugged evaporater. Check that first before you spend a day and a half disassembling your heater to look at the various doors and their controls. Steve > OK, I was told about the evaporator which I will get checked out, however > someone else I know said there may also be a diversion or dispersion door or [quoted text clipped - 22 lines] > > > > -- |
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