2002 HONDA CIVIC 1.7 L THERMOSTAT AND HOSES ; FANS WORK ONLY WHEN AC IS TURNED ON .

Asked by Car Mar 09, 2017 at 10:29 PM about the 2002 Honda Civic DX

Question type: Maintenance & Repair

my 2002 Honda Civic 1.7L is having issues with the cooling system , I think . The
fans won't turn on unless the AC is turned on and the hose that is connected to
my Thermostat gets really HOT BUT THE HOSE UNDERNEATH THE
THERMOSTAT stays cool . What does that mean ?  The temperature gauge
duoesn't rise up to say it's overheating it
just stays in the middle . What do I do?  Is there something wrong??

10 Answers

If the temperature gauge is in the middle then nothing is wrong. Are you losing coolant? The fans only come on when the coolant gets hot enough, they don't run when not needed.

59,725

Its about time for a radiator flush, and a thermostat change and a check both fans, one fan is for when the a/c is on (Auxiliary) and the other fan is for when the coolant reaches a certain temp (primary). If the primary is not working disconnect it and test with a jumper wires, if it works then test the relay, I will add a URL to copy & paste to show how to test relay. There is a sensor to turn on the fan and some test you can do.

3 people found this helpful.
59,725

http://troubleshootmyvehicle.com/honda/1.7L/radiator-fan-relay-test-1

4 people found this helpful.
39,945

I got the the same car and I noticed that when I got it , hit the A/C and the fans go on ,any time you turn on heat fan that A/C light goes on , temp. gauge sits just below half , have put many miles on it with no problems .Haven't driven it in summer yet though .

10

If the heater is not working consistent,, that means your water pump is cavatateing,, getting air in the system,,, then what happens is you get air pocket around the switch sensor witch will can cause the fan not to come on,, you wanna know why,,, wait for it,,, ok i will tell you why,, bad engine design, deck gets warped to easy,, the fans dont come on until 204 " and if you getting compression in the cooling system they might not come on at all,, i surfaced the deck by hand, it took hrs to get it right, look at the deck picture theres no support around the cylinders,, machine shop said the head wasn't warped that bad at all,, 3 thou on each out they say you will have problems,,

1 people found this helpful.
10

If the heater is not working consistent,, that means your water pump is cavatateing,, getting air in the system,,, then what happens is you get air pocket around the switch sensor witch will can cause the fan not to come on,, you wanna know why,,, wait for it,,, ok i will tell you why,, bad engine design, deck gets warped to easy,, the fans dont come on until 204 " and if you getting compression in the cooling system they might not come on at all,, i surfaced the deck by hand, it took hrs to get it right, look at the deck picture theres no support around the cylinders,, machine shop said the head wasn't warped that bad at all,, 3 thou on each out they say you will have problems,,

Your Answer:

Civic

Looking for a Used Civic in your area?

CarGurus has 3,391 nationwide Civic listings starting at $2,230.

Postal Code:

CarGurus Experts

  • #1
    ColdinMA
    Reputation
    2,390
  • #2
    Guru9CNGV
    Reputation
    2,140
  • #3
    GuruDMD1V
    Reputation
    2,130
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Honda Accord
44 Great Deals out of 907 listings starting at $2,799
Used Toyota Corolla
120 Great Deals out of 1,950 listings starting at $1,995
Used Toyota Camry
49 Great Deals out of 952 listings starting at $2,212
Used Honda Civic Coupe
13 Great Deals out of 271 listings starting at $3,990
Used Honda CR-V
89 Great Deals out of 3,819 listings starting at $1,995
Used Hyundai Elantra
159 Great Deals out of 3,192 listings starting at $1,850
Used Lexus IS
26 Great Deals out of 343 listings starting at $5,800
Used Toyota RAV4
79 Great Deals out of 2,040 listings starting at $3,499
Used Honda Civic Hybrid
812 listings starting at $6,998
Used Ford Mustang
53 Great Deals out of 1,256 listings starting at $4,995
Used BMW 3 Series
76 Great Deals out of 1,183 listings starting at $1,995
Used Nissan Altima
27 Great Deals out of 672 listings starting at $2,000

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.