Dear sir. How r you? I have problem my Hyundai sonata 2010 gls 2.4..my car become hot. I change my…

Dear sir. How r you? I have problem my Hyundai sonata 2010 gls 2.4..my car become hot. I change my coolling fan, termostat.. Test other with mecanic. But the cooling fan does not start real time.. Some times its start when hits gone very up.. Mecanic suggest me to change computers systems.. Whats should i do? please answer me if you read my msg. Thank you sir

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