How is the air conditioner in a Volvo?
The hoses that go towards the heating element are fairly warm. The air from the top dash vents is not very warm and even on position 4 the flow is rather weak. The middle vents are warmer and the flowrate is good. The flowrate below is nearly neglible and the temperature is just above 0 C.
Can a heater be removed from a blend door?
If the door is stuck the heater plenum with need to be removed and the problem resolved before installing the new unit. To test the blend door operation and too double check that you are changing the correct actuator motor turn the blower motor on and work the door in each way. You will be able to feel the air change temperature or vent level.
Where is the flapper valve on a Volvo air conditioner?
The problem is the flapper door in the heater is not fully closed. There is an adjustment for this in the cable, just behind the heater control. If you remove the glove compartment, you can see the heater controls. The cable on the bottom controls the flapper valve for heat. The adjustable part of the cable is at the heater control.
How does an air blend door actuator work?
An air blend door actuator is constructed from a plastic housing, a small electric motor and a plastic gear set. A door position sensor is also incorporate into the unit to send feed back information to the climate control computer.
What to do when your a / C is not working in your Volvo?
A quick way to confirm compressor clutch failure is to manually turn the AC on and off. Once the AC clutch obviously disengages itself and begins blowing warm air, turn off the AC with the button on the center console. Give the clutch a few minutes to cool down before turning the AC back on.
How to add Freon to a 2001 Volvo V70?
How to add freon to your 2001 Volvo V70: hook up the can of refrigerant (likely r-134a) to the low pressure port. When your compressor kicks on, add freon to the correct pressure. In addition to cooling, freon lubricates the compressor when it runs.
Why does my Volvo S70 have no AC?
Symptoms on my 1997 S70 was either there was a quick fan blow, everything stopped then the two lights flashed for 20 secs or nothing happened the two lights just flashed, no A/C and no fan. I took it to the dealer for a very expensive repair close to 700 dollars and the fix was a fan motor drawing excessive current.
Why does my Volvo 740 make a hissing sound?
Leaking Sound from Heater Controls. [John Sargent] One of my 740s made a hissing sound from under the dash in the area of the heater temperature control lever. The manual heater control assembly supplies vacuum to the under hood heater valve to shut off coolant flow to the heater core in the cold position of the control lever.
Why is my air conditioner working backwards on my Volvo?
The heater water valvehas a blockage restricting flow and may be in need of replacement; You have a vacuum leak which causes the heat vent control to work improperly; Your firewall-side heater water valve was installed backwards; The arrow on the valve points to towards the firewall inlet, not back towards the engine.
Where is the vacuum valve on a 1990 Volvo?
Vacuum Check Valve Failures. [Inquiry] I have a 1990 760T and the H/AC is losing vacuum during low vacuum and during boost from the turbo. There is a tee above the intake that has two black & white fitting that connect to two smaller hoses that go to the fire wall.
What are the symptoms of a Volvo transmission problem?
Volvo transmission problem symptoms vary. A complete list of possible symptoms includes: Hard shifting between gears or hard downshifts. Volvo does not move when placed in Drive or Reverse. The engine revs up before going into the next gear. Transmission stuck in gear. Common fault codes are TCM-002A, TCM-002B, P0733, P0734.
When do you close the water valve on a Volvo?
[Response] Vacuum to close the water valve is only applied in max AC mode or when the MCC temperature selector is fully cold. This varies according to the type of control system in the car (MCC, ACC, ECC) and the Volvo OEM service manual should be consulted for details of vacuum signals.
Where is the defrost unit on a Volvo?
This rear connection has been known to leak. Leaking Sound from Under Dash. That vacuum leak is almost certainly your floor/defrost diaphragm. It is on the left side of case just above the accelerator pedal. This diaphragm unit is double acting, i.e. it has vacuum to pull it both ways, blue hose for defrost and yellow for floor.
What causes air vents to stay in defrost position?
If you have an older car then the defroster system is controlled by using vacuum supplied by the engine. Lift the hood and inspect the vacuum hose or tube that leads from the intake manifold to the passenger’s side firewall. The image below shows a typical line break which causes the vents to stay in the defrost position.