The main purpose of this thread is get more enlightened on ac system, debunk some wrong notion and show case better testing met and troubleshooting of ac system.
Let kick start this thread with this short quiz .
What do you think will be the long term effect and the most expensive repair that a clogged evaporator will cause on ac system .
N.B - answer must be supported with logical explanation .

A clogged evaporator won't allow the cabin fan suck in air across the fins of the evaporator. This in turn won't allow the AC cool well. Another thing a clogged evaporator would do is the formation of ice on the body of the evaporator. This constant water logging/ Ice forming might cause corrosion on the evep, which will eventually cause leakage.

op asked question about evaporator but included a pix of condenser.

i did not want to answer the question oh, i just wanted to point the above fact out to intending participants of this wonderful thread.

Conner44:
op asked question about evaporator but included a pix of condenser.

i did not want to answer the question oh, i just wanted to point the above fact out to intending participants of this wonderful thread.

It is a evaporator not a condenser, see the whole view

Peppermintflav:
A clogged evaporator won't allow the cabin fan suck in air across the fins of the evaporator. This in turn won't allow the AC cool well. Another thing a clogged evaporator would do is the formation of ice on the body of the evaporator. This constant water logging/ Ice forming might cause corrosion on the evep, which will eventually cause leakage.

You are actually right, nice attempt,but this is not the biggest issue , but if I may ask further, what is the science behind the formation of ice on blocked evaporator .

update ooooo....


make we learn biko

thread looks fine

autologic:

You are actually right, nice attempt,but this is not the biggest issue , but if I may ask further, what is the science behind the formation of ice on blocked evaporator .

Poor or no heat exchange between the surrounding air and the evaporator.

Please is there any good and honest AC technician here who stays in port Harcourt?

autologic:

It is a evaporator not a condenser, see the whole view

oh my bad. continue with your good works bro.

Honmusa, this Autologic thread is alive and not being deleted as against what you posted here https://www.nairaland.com/6614995/re-deletion-autologic-thread-mods


Since it is Q&A thread,

Please does anyone knows how much is Toyota camry 09 AC cabin air filter.

Cc:
Kingreign
Nurey
Gazzuzz Autologic

Aanumi16:
Honmusa, this Autologic thread is alive and not being deleted as against what you posted here https://www.nairaland.com/6614995/re-deletion-autologic-thread-mods


Since it is Q&A thread,

Please does anyone knows how much is Toyota camry 09 AC cabin air filter.

Cc:
Kingreign
Nurey
Gazzuzz Autologic

₦2,000-₦5,000 depending on location of purchase.

kingreign:

₦2,000-₦5,000 depending on location of purchase.

Thanks

Also a clogged evaporator if left unchecked for long, will cause damage to the compressor. This is because whenever it freezes up, it starves the compressor of oil, also it puts pressure on the compressor, thereby causing excessive heat build up on the compressor.

Peppermintflav:
Also a clogged evaporator if left unchecked for long, will cause damage to the compressor. This is because whenever it freezes up, it starves the compressor of oil, also it puts pressure on the compressor, thereby causing excessive heat build up on the compressor.

Exactly ,the most expensive repair will be to the compressor but that is not exactly how it will damage the compressor .
I will try to discuss how a clogged evaporator can destroy compressor in subsequent page.
Kudos to you,nice attempt .

9icetoo:

Poor or no heat exchange between the surrounding air and the evaporator.

Yes but to put it in detail explanation:
poor airflow will drop the evaporator saturation temperature (boiling point) below 0 centigrade and will cause the air around the evaporator to freeze and this freezing will even extend up to the suction hose as show in pix below .

Manufacturers have already gone
ahead to prevent freezing even the airflow is restricted by designing the ac modules to trigger off the compressor whenever the evaporator temperature is tending towards 0 degrees centigrade by use of the evaporator temperature sensor .
However your ac can still freeze if there are faulty evaporator temperature sensor or wrong use of ac thermostat and setting it below 0 degree done by some local ac technicians

So if you see your compressor is perpetually cycling off and on ,in most cases the evaporator has gotten near 0 degrees due to restricted airflow and the control module is purposely turning it off the ac to prevent freezing of the evaporator and the ac pipes thereby protecting your compressor from effect of frozen evaporator ,which now will now takes us to the next question:
How can a restricted airflow to the evaporator damage a compressor

chidirobert:
Please is there any good and honest AC technician here who stays in port Harcourt?

What's wrong with your car ac?

check Mrford here on NL

chidirobert:
Please is there any good and honest AC technician here who stays in port Harcourt?

you don already reach here boss

Mrford:


What's wrong with your car ac?

Brunel:
you don already reach here boss

Nice thread.

clogged evaporator means the cold air is not being released into the cabin and so this cold is recycled into the system and with time will reduce the efficiency of the system.

lol just my laymans answer

autologic:
So if you see your compressor is perpetually cycling off and on ,in most cases the evaporator has gotten near 0 degrees due to restricted airflow and the control module is purposely turning it off the ac to prevent freezing of the evaporator and the ac pipes thereby protecting your compressor from effect of frozen evaporator ,which now will now takes us to the next question:
How can a restricted airflow to the evaporator damage a compressor

it will definitely damage the compressor by making sure the compressor gets damaged.

@autologic. I'm having issues with my ac system. My evaporator had a leak on it before but has been replaced with a new hbs evaporator, a new expansion valve and some desiccant and compressor oii and a new cabin filter.

After everything was fixed the technician put in that cheb gas that has JJ okocha face on it. After all this i realized that my ac only cools when the weather is cold in the morning and in the cool evening but does not cool when the weather is hot in the afternoon. I thought it was because the cheb okocha gas is low quality. I then removed all the gas and put new harp gas because I was told harp is of better quality. But the problem of not cooling during hot weather still persists. Please what could be the cause of this?

obidevine:
@autologic. I'm having issues with my ac system. My evaporator had a leak on it before but has been replaced with a new hbs evaporator, a new expansion valve and some desiccant and compressor oii and a new cabin filter.

After everything was fixed the technician put in that cheb gas that has JJ okocha face on it. After all this i realized that my ac only cools when the weather is cold in the morning and in the cool evening but does not cool when the weather is hot in the afternoon. I thought it was because the cheb okocha gas is low quality. I then removed all the gas and put new harp gas because I was told harp is of better quality. But the problem of not cooling during hot weather still persists. Please what could be the cause of this?

I am strong believer of making use of technical data to support my analysis ,I don't do guess talk cos there a lot of variables to consider ranging from low refrigerant, clogged systems, mismatched expansion valve, over filling, worn compressor ,might even be airflow issue etc
Look for ac technican with ac diagnostics toolz
i.e the ac manifold guage ,and take pressure reading of suction and liquid side at both different condition of compressor off and compressor runing as depicted below and post it here for analysis.

Nice

Hello autologic..

I need you to help diagnose my AC, presently the compressor is packed up.

Where is your location please.
Thanks

automine:
Hello autologic..

I need you to help diagnose my AC, presently the compressor is packed up.

Where is your location please.
Thanks

Nigerian Airforce Vehicle Repair Base
onipetesi bus stop ,ikeja ,agege road lagos .
https://maps.app./RswGgpc4j4tFUb1T7

Hello autologic.

My A/C used to be very cool at lowest that it freezes my hand when holding my steering to drive if I don't adjust the circulation vent away from my hand.

But now, the lowest does not even blow the air strong enough to touch me like before and it's not nearly as cool as before again (although it still cool sha) and when I engage the a/c, it makes this bad dragging sound like the exhaus is blown (but is not) when I accelerate from a static point and the sound clears up when the car is on the run.
Some people say is normal that is engine is loaded up, that why it makes the sound, but some say the sound is from the compressor, that I shud have it checked.

The car is Corolla 2003, pls help.

izaac23:
Hello autologic.

My A/C used to be very cool at lowest that it freezes my hand when holding my steering to drive if I don't adjust the circulation vent away from my hand.

But now, the lowest does not even blow the air strong enough to touch me like before and it's not nearly as cool as before again (although it still cool sha) and when I engage the a/c, it makes this bad dragging sound like the exhaus is blown (but is not) when I accelerate from a static point and the sound clears up when the car is on the run.
Some people say is normal that is engine is loaded up, that why it makes the sound, but some say the sound is from the compressor, that I shud have it checked.

The car is Corolla 2003, pls help.

No relationship btw the ac not cooling fine and the noise on putting on the ac .
For the ac not cooling fine,degraded performances due to any of these possibilities can be responsible : dirty pollen filters, non condensable gas mixing with the refrigerant inside the system,dirty condenser etc ,best bet have it check up by a competent ac tech .
Noise can be as result of worn belt,bad rollers etc ,physical inspection is needed