Question about 1998 Chevrolet Astro

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Ac speed problems

In my 1998 hey strova v 6 modl the ac only blows on low and up to the last spee befre high .can u give m sugestions?

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Replace the blower motor resistor.

Posted on Jun 21, 2009

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Posted on Jan 02, 2017

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What do the fuse relays under the hood of a 1998 oldsmobile 88 ls control


You have fuses and relays . The fuses are or should br labled inside each cover if still there as well as on the fuse block itself, If not I can look under the hood of mine and tell you. The relays from left to right thats passenger to driver and numbered including the empty spaces as mine hase three on the right and two on the left with three emty slots in between. Now Olds seems to have kept this araingement for some time also my '98 88 has ABS as part of TCS but no relays there and diferent climate controls over the years it is posible you have more or less than are presnt on mine the complete list is as follows
#1 - AC compressor control for the compressors clutch
#2 - Horn relay
#3 - AC blower fan motor on, at low speed on the '98
#4 - AC blower motor off or high speed depending on year, not present on my "98
#5 - ABS pump relay ,not present on my '98
#6 - ABS Main relay also labled as pump relay for some years, not present on '98
#7 - High speed cooling or radiator fan
#8 - Low speed cooling or radiator fan

Feb 22, 2015 | 1998 Oldsmobile Eighty Eight

1 Answer

2005 equinox ac fan only works at low speed. I just had it flushed and coolant added last year


There are two relays for the fans. One is a low speed relay and the other is a high speed relay. There are also fuses for the fans high speed and low. Take the cover off or the under hood fuse box and on the inside of the cover it will give a diagram of the fuses and relays. Try swapping the relays with something else and see if the fans go to high when you turn on the A/C as it always should. Sound like a bad High Speed Fan Relay to me but check it out.

Jul 21, 2011 | Chevrolet Equinox Cars & Trucks

1 Answer

1998 Pontiac Grand Prix GT - Blower Motor will not blow in the lower speeds, High Speed (5) only. Resistor has been replaced 3 times in the last twenty four hours, blower motor has been replaced twice in...


Your ignition switch is bogus. High speed runs directly off the speed control but the lower speeds go thru the ignition switch. Do not know why but that is the way it is!!!!!!!!
Replace the ignition switch and you will be back in business.

Jun 20, 2017 | 1998 Pontiac Grand Prix

1 Answer

1997 geo prizm the AC blows air out at 80 degrees, I had the pressures checked and they are at the proper pressure, the high pressure line is warm to hot but the low pressure line is just cool, the...


What are the pressures?And the low side line going into the firewall should be cold.We need to know what the pressures are,and is the evaporator sweating>and giving off condensation?If the vents are blowing out 80 degrees,then the temp door is not moving .It is either a door actuator motor,or a vacuum that is not working the temp door,check for a bad vacuum under the hood,going into the firewall.

Aug 03, 2010 | 1997 Geo Prizm

1 Answer

AC comes on, then shuts down before car is cooled. Compressor activates and blows cool air for about 15 seconds then shuts down.


Low on R134a, you need to have the system recharged. Try to stay away from the do it your self kit that most Auto Parts store carry.
Below are normal car AC pressure readings with 134A

Normal readings on high and low side with AC OFF (static pressure) – Depends on outside temperature, but normally is between 80-105 PSI

Normal low side reading with AC on high speed and MAX & engine at 800-1000 RPM’s – Ranges from 25-35 PSI

Normal high side reading ranges from 200-350 PSI

Don’t assume that if adding little Freon is good that adding a lot is better! Overcharging just a little can decrease the performance of the system and possibly damage the compressor.

Thank you for using fixya and good luck.

http://www.freeautomechanic.com/airconditioning.html

Jun 12, 2010 | 1998 Cadillac Eldorado

1 Answer

1998 gmc sonoma air conditioner - not cold


Check the magnetic clutch is engaged on front of a/c pump, have the motor running, a/c on and fan on high, if the centre hub is static the pump in not switched on, this can happen when the gas pressure gets low.

Aug 05, 2009 | 1998 GMC Sonoma

1 Answer

99 dodge ram 1500 ac problem


recharge your system, it;s low on refrigerat, there is not enough liquid going into the evap to help maintain cooling, hence the speed of the compressor. install gauges to check pressures at idle, if not to spec , recharge. if it's low you have a leak to repair. also make sure your AC condenser is clear. GOOD LUCK. RDJRP

Jul 23, 2009 | 1998 Dodge Ram 1500 4WD

4 Answers

Where do I recharge ac at


there are 2 ports one for low pressure and one for high pressure. the low pressure is bigger in diameter and is usually close to the dryer and or fender and firewall. the high pressure is near the condensor on the fron of the vehicle. if there are caps for the ports low will be blue and high will be red. low side pressure should be 35-50 psi and high pressure should be 135-150 psi

May 11, 2009 | 1998 Dodge Dakota

1 Answer

AC fan speed


i had this same problem in my chevy prism-- my fan regulator had broken. (apparently it usually happens around 100k miles, i hear) in my car, the vents wouldn't even blow air at all on anything but high--- not just AC, but normal vented air as well.

cost about $80 to have the problem fixed by my mechanic in Jersey. hope that helps!

Oct 14, 2008 | 1988 Jeep Cherokee

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