MONTERO BLISTER HIGH TEMPERATOR INDICATOR 2001

Dear Sirs.

His help please, some time ago the temperature meter on the board of a 2001 manual montero varies constantly, reaches the maximum H, then goes down to the normal position is stable for a while and then goes back to the maximum H, check the radiator but it has no leaks,
greetings.

Friend: It would be good to have more data I would recommend that you check the electrventillator, at what time it lights, if the water pump works correctly and as last but not unlikely controls operation of the thermostat.

Thank you for the answer, having told you the electrventilator has no problem, the water pump either, curiously when disconnecting the cable that sends the signal to the board, the temperature rises 20 % from the cold position C position, therefore I assume that the heat around the engine causes this slight increase in temperature, will it be problem of the electronic card of the board? Or the thermostat that is the question that occurs to me now.

Thanks and greetings

Friend If the vehicle does not heat up, changing the bulb of the temperature marker if the problem then persists the board would be the problem, the other test is to look