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Discussion Starter #1
Does anyone know where the heater control valve is ? The AC has been acting up in this heat . Recovered and recharged with measured amount . . It wasn't low . Ac is blowing cold / luke warm in cycles .
 

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Does anyone know where the heater control valve is ? The AC has been acting up in this heat . Recovered and recharged with measured amount . . It wasn't low . Ac is blowing cold / luke warm in cycles .
The temperature control valve is inside the HVAC box. Heater control valves are an extinct species.

I assume you took it in for recharging & your a/c problems continue.

The compressor could be cycling on & off (watch it & see) or your condenser cooling fan could be misbehaving.

Does it blow warm air at idle & cool air while underway?
 

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Going down the road it will be cold them it will start to warm up .I'll take a look at the compressor to make sure it's cycling . Also take a look at and watch the fans . Thanks
 

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Discussion Starter #6
Output air goes from cold to warm going down the road at 65 mph or less . Thanks for your input .
 

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Assuming you have manual climate control, it could be that the clutch is disengaging when it gets warm due to a too wide clutch gap.
 
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