The people I was with and I used to drive an older car all over the country.
During a road trip while I was in the warm season the people I was with and I ran into a massive problem with our oil furnace not turning off at all. Imagine driving on a really tepid day plus suddenly your vehicle is pumping out tepid air non stop, then unluckyly the people I was with and I definitely could not get the vehicle into the shop as the small town the people I was with and I were in at that moment did not have 1, then so in order to make it to our friend’s graduation our husband had to install a basic shutoff to the ventilation system in our vehicle when the people I was with and I stopped at once for the night to be able to make it to our destination before the people I was with and I suddenly passed out from heat exhaustion. He used a coat hanger up to close the vent to resourcefully stop the warm air from blowing in through the car. The people I was with and I were able to finally make it all the way to the graduation. The people I was with and I ended up staying an extra day just to get the flaming hot vehicle into the shop so the people I was with and I could control the furnace the right way on the road. The HVAC specialist that inspected the vehicle said this was a usual issue with this vehicle model plus although it is a simple fix all the people just suffer through it. He laughed when he saw what we did with the coat hanger under the dash as that was the most ingenious way he had seen to fix the problem until a HVAC service could be made on the car. He fixed the oil furnace vent for us plus the people I was with and I had no further complications with it until the blower went rightout. So many factors go into the service plus functioning of a road trip vehicle HVAC system.