2002 Honda Civic Si Q&A

2002 Honda Civic Si Question: My temp. gauge climbs to HOT; not sure what to replace - Thermostat or Fan relay

Driving along and my temperature gauge rises to hot. Sometimes it the temp. will drop on the gauge, some times it won't. -
Answer 1
does the fan work? if fan works relay is good -
Answer 2
I would try changing the t stat if that doesnt work then I would check the head gasket -
Answer 3
Have you checked the coolant level (cold), in both rad. and reservoir? -