Hi, my thermostat died last week (open),my temp gauge is always low and i lost about 50% of heating.I live in canada (quebec) its cold and snowy ,wich thermostat should i buy.I went on eastern aerospace and they sell the 180f thermo, should i stick to the volvos or a lower temp one.By the way i will install the ipd ecu and catback ( in 3weeks), does that make any difference??? thanks alot..... Dan.