Welcome to the CRVOC forum. Many fine folks here from around the globe.

Click on your avatar in the upper right hand corner, --> Account Settings, --> Vehicle Details. Complete for your vehicle, then hit Save. At present, there are 6 generations of the V on the road today. Knowing the year & trim level of the vehicle in question helps those asking & those willing to respond.

Is this a sudden problem, or have you noticed a reduction in cooling over the past several weeks? Our previous V was a 2008, which are infamous for compressor failure. Had to replace the compressor on it when we had the same type of problem. Any record from previous ownership of the compressor replacement?

Many systems on the V are DIY serviceable. IMHO, the A/C system is not one of them. Go to an A/C shop & have them hook up their valves to your system. That will give you a starting point for any repair work. If you try to DIY & attempt to add more freon, you may overcharge which will cause some more problems.

Bite the bullet & have it professionally inspected.

 

I had the exact issue, and it turned out to be a failed temperature sensor on the compressor, which is an inexpensive part. The AC works at first because the engine is cool, but as soon as the engine (and sensor) warm up even a little bit, the temperature sensor thinks the compressor is overheated, (which it actually isn't), and shuts the compressor off. That's when the warm air starts. I found a Youtube video that goes through a lot of possible problems, but this was mine.

 

Could be a failing AC clutch relay as well. If you check the fuse box under the hood I recall one of the engine fan relays is the same as the AC clutch relay. When I had issues at one point a mechanic suggested I swap the relays to rule out a failing relay. In my case the clutch coil was fried.

 

Was the cabin filter replaced frequently?

A dirty cabin filter will cause the evaporator core to freeze up. Once the ice melts, its back to cold until it freezes again. If that's the case make sure you clean the housing where the filter sits before installing a new one. next Q. Will answers Y.


Is the drain pipe dripping water outside?

A clogged up drain will also cause the evaporator core to freeze up. Once the ice melts that water will overflow the ac housing making the front floors wet. You will be greeted every morning with that musky wet carpet scent.

On a side note.
In a pinch...

If you suspect the clutch is worn-out and there is low grip when engaged, there is a shim( at least my RD1 has it) that you can remove and close the gap between the clutch plate and the pully( which serves as the flywheel).

I'm not familiar with your V but, I thought it might help.
Gl

 

Welcome.....first thing I think of is a/c clutch may be worn out, next is issue with blend door under dash. But agree w/above- let an ac shop ck it.....if you know of one you can trust!

 

Let me prefix this by saying that I do not know enough to be definitive about AC systems. Just learning.

The refrigerant R134A is temp and psi correlated. Meaning when AC system is off, checking the pressure in the system, it should read very close to the ambient temperature. If 90 degrees out then the psi reading should be 90 psi. This will tell you right away if the AC system has the proper pressure of refrigerant.

The blowing cold then hot then cold again could be the expansion valve is failing?? Or could be clogged evaporator fins?? Check cabin air filter. Sorry, do not know where the expansion valve is located. If you find out then let us know. Thanks.

 

Sorry, do not know where the expansion valve is located. If you find out then let us know. Thanks.

It is on the passenger side firewall. Access is from the inside (service manual) but most videos show it changed at the firewall, e.g.: exp valve re/re

 

It's definitely a bad AC compressor clutch, failing to engage when it gets hot..... those symptoms you're having are typical of a failed AC clutch and coil. I replaced mine a few years ago with a new set(pulley, clutch and field coil) I purchased on Amazon, for under $40. I also replaced the AC relay, just to be sure. My AC has been working great ever since. There are numerous threads on here, about our Gen 3 failed AC clutch.

 

Are your cooling fans working? With the A/C on, both fans should be turning.

 

My father-in told me last week he had the same symptoms with his 2009 CRV. I told him I have no idea.

 

My ac compressor works and both fan working refrigerant is level coolant and radiator level fuses all good but ac still blows hot air in my 08 crv can someone help

 

I would see local mechanic.

Closing thread, OP never returned, start new thread.