a Honda mechanic friend said i needed an expansion valve for the AC. Where is it located on this model? My car is cool initially then the AC goes from somewhat cold to warm when I stop at red lights. Once the air blows warm it stays warm until I shut the car off for a while. There is no overheating, no coolant leaks, plenty of 'freon'. So i know it's an A/C problem. Does the expansion valve typically cause this? Car has 280,000 miles.
Expansion valve on 1990 Honda Accord
by McGyver in Nashville, TN on May 01, 2009
3 answers 1 comment
ANSWER by patrick mannion on May 01, 2009
The expansion valve is located behind the dash in the evaporator housing. It could be causing the problem you describe. To replace it requires evacuating the refrigerant and recharging the air conditioning system after the valve has ben replaced.
COMMENT by McGyver on May 03, 2009
Thank you! We may give it a go today.
ANSWER by gato on August 12, 2009
I WILL TAKE A " GUESS "!! YES IT MAKES SINCE THAT (1). A BAD OR CLOGGED EXPANSION-VALVE WOULD CAUSE THE SYMPTOMS YOU DISCRIBED ; BLOWING COLD FOR A 'LITTLE' WHILE ,THEN BLOWING 'HOT' AND THEN NOT COOLING AGAIN UNTIL THE CAR IS RESTARTED. IT SOUNDS AS IF THERE IS A RISTRICTION IN THE LINE,AFTER ALL THE COMPRESSOR WORKS FOR A LITTLE WHILE AT LEAST, AND FREON LEVEL IS OK.
ANSWER by Visitor on June 16, 2010
1990 HONDA ACCORD EXPANSIN VALVE : WHERE IS IT LOCATED
...warmer. after the car sits a while and is restarted it will be cold again. im told this is the expansion valve or the pressure switch. im confused as to what to do to resolve this.
...the same instead of balancing out. I've had advice as it's the drier, the compressor, and the expansion valve. I'm a little stumped as where to go as the running pressues aren't that bad to me.
I have had to add freon almost every year. It usually takes the charge and the a/c works however this year it did not work. When adding the freon it just cycles thru and I have air con 4 about 5 m...
MY AC STILL WANT WORK THEY SAID THST THE PRESSURE IS HIGH ON NE SIDE & LOW ON THE OTHER SIDE MEANING THE AIR IS GETTING COOL ON ONE SIDE NOT THE OTHER SIDE THEY VACUUM THE CAR DOWN & RECHARGE IT ST...
a/c wont blow cold only slightly cool compressor comes on had system evaced and replaced a/c dryer then had recharged still same time of recharge said no leaks any ideas