T30 2545 relief valve on manifold head

Some pressure switches have a valve that reliefs the compressor head pressure when the motor stops and closes the head pressure relief valve when the motor runs.
There is a check valve that keeps air pressure from coming back to the compressor head and the relief valve.
I think the check valve is leaking tank pressure to the relief valve and compressor head.
The check valve is where the pressure switch mounts on to and it mounts threaded on to the compressor tank.
Try replacing the check valve

The over-pressure relief valve may be defective if the valve is opening before the desired tank pressure is reached. If not, then the shut-off pressure adjustment (if there is one) may be set wrong. You'll need to find out from the manufacturer exactly what static tank pressure the compressor is designed to provide and then determine if it is working correctly. If so, then the relief valve might be defective. DO NOT attempt to defeat the relief valve under any circumstances - it can result in compressor damage or a dangerous tank failure.

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/dave_fb2c45146b845cea

Easy fix, replace faulty relief valve, also look at the on/off cycle switch!

You didn't give the model of your compressor so, for an electric model: Check your gages while the tanks are filling. If the pressure gets to the rated high pressure level for your model and keeps going until the relief valve pops, the problem is with the pressure switch. It isn't turning the motor off when it's supposed to. If the relief valve pops before getting to the max pressure the tanks are supposed to be at then the spring in the valve is broken or weakened to where it pops too early. Replace the relief valve.

relief valve should only open in a over pressure condition. If it is opening prior to reaching pressure ....replace it.

what is the water pressure on the cold side? You may need to install a pressure reducing valve at the water heater inlet to reduce inlet pressure and keep pop off valve from opening when not needed.

depends on what relief valve it is, if it is a 2 stage pump and it is the relief on the inner-stage that is lifting indicates the second stage is not pumping correctly! I would check for a broken valve. if it is the one on the discharge line to the tank, then something is restricting it, check for blockages in the line or in the check valve entering into the tank. Most important you isolate the compressor and drain all air pressure before you attempt any repairs

They come with the heater when purchased, if it's a gas operated heater you can buy the relief valve at any hardware store and plumb the valve to or threw the floor to code so that if it does pop off you can keep from damaging the room it's in.

What pressure is it popping off at? You might have to adjust the pressure switch to a lower setting.

Hi,

I had the same problem with my DC08. What I had found is that cleaning the main washable filter will remove the problem. I have a log fire at my place and I have found that the vacuum does not like the dust from the fire. Even though I sweep up any ash before vacuuming, the problem still exists. At times over winter I will have to clean the filter every week as it doesn't take long for the relief valve to start to open. Over summer, I have no relief valve problems at all. Hope this helps.