Why does my car try to run hot when the AC is on?The thermostat has been changed and I have coolant.If I go 70mil per hr it runs just fine.it runs hot whenever it's not in motion and AC is on

10

Asked by Jul 28, 2015 at 07:32 PM about the 2002 Honda Accord EX

Question type: Maintenance & Repair

The temperature hand goes up like it's
running hot when AC is on...turn it off, the
hand goes bck to normal...The coolant
never boils over...

4 Answers

10

Someone Please help

1 out of 1 people think this is helpful.
17,660

Are the radiator fans coming on when you turn on your A.C. ?

1 out of 1 people think this is helpful.
840

The water pump impeller is going bad. The water pump uses the same belt than the AC and therefore the RPM on the impeller has less traction. Less traction equal less movement of the collant thru the engine.. I will suspect that you should replace the water pump. The coolant needs to run at a certain speed in order to maintain a constant temperature in the engine. Piece of advise: if water pump is replaced, change in the same time the serpentine belt.

5 out of 5 people think this is helpful.
17,660

I would try cleaning the radiator and A.C condenser coil with a garden hose and nozzle or better yet a pressure washer. If the fans are coming on and starts to over heat just idling and drive and it and its good the radiator and condenser coil maybe partially clogged with dirt and bugs restricting air across the fins that maybe why it stops over heating when you drive because air is being forced through fins. Tortoine maybe right it maybe the water pump but I would try to clean the radiator and condenser coil fins first it is cheaper and worth a try.

2 out of 2 people think this is helpful.

Your Answer

Add photo

Related Questions

Accord

Looking for a Used Accord in your area?

CarGurus has 81,609 nationwide Accord listings starting at $899.

ZIP:

Search Honda Accord Questions

Honda Accord Experts

#1 Tom Demyan
Tom Demyan
Reputation 1,980
#2 FordNut
FordNut
Reputation 1,560
#3 Jonathan Ford
Jonathan Ford
Reputation 1,440
View All

Related Models For Sale

Used Honda Civic
669 Great Deals out of 77,410 listings starting at $1,000
Used Toyota Camry
1,103 Great Deals out of 96,275 listings starting at $1,250
Used Nissan Altima
1,090 Great Deals out of 82,556 listings starting at $670
Used Honda Accord Coupe
173 Great Deals out of 10,691 listings starting at $2,200
Used Nissan Maxima
347 Great Deals out of 25,221 listings starting at $1,400
Used Toyota Corolla
877 Great Deals out of 74,413 listings starting at $1,500
Used Honda CR-V
814 Great Deals out of 59,369 listings starting at $1,200
Used Acura TL
303 Great Deals out of 7,934 listings starting at $2,499
Used Hyundai Sonata
608 Great Deals out of 51,091 listings starting at $1,300
Used BMW 3 Series
1,387 Great Deals out of 37,824 listings starting at $1,500
Used Chevrolet Malibu
1,007 Great Deals out of 85,671 listings starting at $1,995
Used Kia Optima
518 Great Deals out of 31,017 listings starting at $2,000
Used Chevrolet Impala
796 Great Deals out of 34,383 listings starting at $799

Used Cars For Sale

2017 Honda Accord EX For Sale
2,745 listings starting at $22,116
2016 Honda Accord EX For Sale
3 Great Deals out of 363 listings starting at $16,990
2015 Honda Accord EX For Sale
11 Great Deals out of 362 listings starting at $13,991
2014 Honda Accord EX For Sale
24 Great Deals out of 851 listings starting at $12,171
2013 Honda Accord EX For Sale
9 Great Deals out of 347 listings starting at $9,999