HOw can I check to see if my thermostat is working? on 1993 Honda Accord

1993 Honda Accord, 4cyl - Engine temp rises when at idle. Top radiator hose is hot, bottom radiator hose barely warm. Is that a thermostat issue? How can I make sure before I try to replace?

by in Surprise, AZ on November 28, 2012
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2 answers 5 comments
ANSWER by , November 29, 2012
agree with ziptie. ck all the things he rec
ANSWER by , November 28, 2012
how high is the guage going? Do the radiator cooling fan(s) operate when the guage reaches about halfway?Coolant comes out of rad. back to engine from bottom hose , so I would hope it's cooler , otherwise your rad. is not working.Sounds like normal operation.
COMMENT by , November 29, 2012
Yes, after driving a while and then idling at a stop the temp gauge goes up just short of the red zone. Then when I take off again the needle moves back to the middle range. The radiator fan only goes on after I've stopped and turned the vehicle off.
COMMENT by , November 29, 2012
CK COOLANT LEVEL AND MAKE SURE YOU HAVE GOOD COOLANT FLOW
COMMENT by , November 29, 2012
Coolant levels are full inside the radiator and the overflow.
COMMENT by , December 05, 2012
Have engine cooling fan CONTROLS checked.
COMMENT by , December 05, 2012
Ok, thanks Zip. So, doesn't sound like anyone thinks it's a thermostat issue?