Some systems use engine vacuum to move the control doors. You could have a vacuum leak.
Madagascan hissing cockroaches make a noise by forcing air out of a special hole.
when you breath is air and force it out with your tongue it makes the hissing noise
Check the a/c - heater controller and also check for a vacuum leak.........
making a hissing noise
A hole in the chest ... the hissing comes from the leaking air.
A hissing noise
Hissing usually means a leaker and time to replace it especially if it is 10 years old or more
Yes. They make grunting-hissing noises.
Possums make a variety of hissing and snorting noises.
The clicking noise near your 2004 Ford Explorer's heater controls could be caused by a malfunctioning blend door actuator, which controls the flow of air between the heater and the air conditioning system. It might also be due to debris or foreign objects obstructing the actuator's movement. Another possibility is a failing or worn-out component within the climate control system. If the noise persists, it may be advisable to have a professional technician inspect the system for any issues.
The hissing sound of the blue flame on a Bunsen burner is due to the rapid movement of gas molecules as they mix with air and combust. This turbulence creates vibrations and generates sound waves, resulting in the hissing noise.
no, u should not hear anything when block heater is plugged in