For laboratory dawn is the best and nobody does it better than them sheikh Amin keh sath aik aur shop hai but prices on front are high there is Jabbar Autos at back in middle there prices are reasonable
For mechanical and electrical my mechanic Tariq khattak and alignment and balancing Abid alignment in pindi
Ur current issue of heater is firstly check glow plugs and ask Electrician to check current level I M sure either one or 2 of ur glow plugs are gone so replace them and issue will be reaolved