well why does my temp gauge never go above the C mark. it does move because it starts way below the c mark and slowely moves up to the C. the car gets hot and it stays on C and no fan ever kicks in..

 

I'll take a stab at this.

Your 2005 Accord V6 has two Engine Coolant Temperature (ECT) sensors; ECT sensor 1 and ECT sensor 2. I don't believe the 2003-2004 Accord V6 had ECT 2; but, was added starting for the 2005 - 2007 models.

From reading your posts, doesn't sound like you have a Check Engine Light; so, possibly no diagnostic trouble codes (DTCs). For the gauge reading problem, although, you have no DTCs for the ECT sensors, there may be a chance of a problem with one of the ECT sensors, the ECM, or your instrument gauge. But, check connectors, wire, etc. first.

It is unusual for both radiator fan and A/C condenser fan not to run. Your car has three relays in the cooling system circuit: A/C condenser fan relay, radiator fan relay, and the fan control relay. From looking at the circuit, it looks like both radiator fan motor and A/C condenser fan motor circuits run through the fan control relay. So, my guess would be to check the fan control relay as a possible cause for both fans not running, or possibly a problem with an ECT sensor.

A recommended course of action may be having a qualified mechanic diagnosis the problem(s) and/or getting the factory service manual.

 

i checked all 3 relays and they clicked so they are all good? hmm ya i tried one new ect and it didnt help maybe ill do the other one now. but could that relay be bad even though it clicked?

 

remember the coolant temp gauge works its just not calibrated right cause it starts way below C then moves up to the C never any higher. but that wouldnt have an effect on the fans not turning on when a/c is on

 

A click means the switch has moved (closed), it does not necessarily mean the relay is good. The load circuit switch contacts could still be faulty (high resistance), and further testing is required. Refer to pg. 15 of this link:

autoshop101.com/forms/hweb2.pdf

 

The temperature gauge may be a separate issue from the fans. If it is the ECU, it may possibly affect both. But, the problem may be a faulty instrument gauge, wiring, connector, etc., etc....

 

I would have your battery/alternator tested at a parts store. Recently, someone on here had a gauge acting like yours and the car battery was the problem. I would also clean all ends of both battery cables.

I would start testing on the two fans for the condenser. Get a volt meter and see if there is 12V to the connector for each fan when the a/c is running.