Advice and FAQ's for your vehicles Air
Conditioning and Climate Control
Q: Why should I choose AVACS to service or repair my
car air conditioning or climate control?
A: AVACS are specialists in repairing all brands of
vehicle air conditioning and climate control systems and
because we specialise we will quickly diagnose and repair
the fault if it has one. We don't guess and we don't fit
parts as a process of elimination. We test and investigate
car air conditioning problems properly and only fit the
parts that are required, therefore saving you money.
Q: Can AVACS diagnose my car air conditioning fault
over the phone?
A: Accurately no we cannot, it is always best that we
see the car and we can then tell you exactly where the
problem is and give you a no obligation quotation to repair
Q: How often should I have my Air Conditioning
A: At least every two years. Vehicles loose about 15%
of their refrigerant per year. Refrigerant level checks form
part of the Avacs Ltd service this will affect the system
performance and will lead to expensive repair bills
Q: Why should the a/c system be used even during the
A: Using the a/c system during winter months will
prevent the windows from misting inside the vehicle as the
air is dehumidified, and regular use will help prevent oil
seals drying out this will help in preventing refrigerant
loss or component failure.
Q: Are there different types of refrigerant?
A: Yes, R12 was used up to October 2005 but its use
is now banned, later produced vehicles use R134A.
Refrigerants must never be mixed or cross-contaminated R134A
is the only gas approved by all compressor and vehicle
Q: My car A/C is filled with the old type R12
Refrigerant can this be changed to use the new R134a
A: There are a number of ways of converting a system
to accept the new type refrigerant, without going to the
expense of replacing major components. This is known as
Q: What is the evaporator?
A: This is usually situated behind the
dashboard with a blower, which draws the warm air from the
vehicle over the cooled evaporator and back to the vehicle
Q: I have been told my car has a very small leak
possibly in the evaporator, is there an option to
A: Unfortunately there is no quick fix, some
companies use sealant to try cure this fault. The problem
with sealants they can cause other serious problems!
Q: What does the compressor do?
A: This is the heart of the air conditioning system
and pumps refrigerant around the various components.
Q: Why does the compressor seize?
A: Primarily failure is caused through lack of
lubrication, it is important to ensure that the refrigerant
levels are kept topped up and that the compressor is used
regularly throughout the year.
Q: Why flush the system if the compressor has seized?
A: When the compressor has seized metal
particles/filings can be deposited in the system, these must
be flushed out before fitting a new compressor and the
filter dryer and block/expansion valve should also be
Q: What does the filter/dryer do?
A: The filter/dryer is filled with desiccant; this
absorbs harmful moisture and acids from the a/c system and
acts as a filter similarly to an oil filter on a car engine.
Q: Why change the filter/dryer?
A: After approximately 2 years the filter/dryer
becomes saturated with moisture and the a/c system becomes
less efficient and the cooling effect inside the vehicle