Hello I have a renault vel satisfies and the case is that when you whet more than 30 km without stop+o- the temperature is triggered, instead if you are streets the temperature is maintained in its normal position. The cluster joint is already checked by putting air, thermostat, water pump, refrigeration circuit. The question is that the hoses get dirty when it warms up and the strange pressure on the circuit. Thank you all and greetings.