Air conditioning and heat in car smells like pee?

that's caused by leaves and old debris that gets through the outside vents in it,and sometimes rodents like mice will build a nest in the heater box,the best way to get rid of the smell is to remove the heater box and clean it all out,i have done a few,and its not a good job to have to do,i had a ford probe that was like this,and when i took the heater ox apart there was a small mouse nest in it,and it cooked all of them,good luck on this.

Maybe cats got under the hood and peed all over the place. They did that in my neighbors car and he never got the smell out, had to sell the car.

Have you tried putting marmite in your cottage pie? that should clear the offensive odors right up. Cheerio love.

maybe change the cabin air filter could help...