Re: 2001 f150 5.4l 4x4. Compressor constantly kicks on
Yes more than likely your truck is low on 134 but to get the right amount it needs to be sucked out and recharded but i just use a set of a c gauges and kind of guess on the pressures depending on temperture out side. and temperture of the trucks air at the vents the parts stores sell a recharge can with a gauge they can be used also. now just go to the pump and follow the lines and you will find a cap (red or blue ) you want the blue one that is were u can safely charge if there is no caps you will find a couple of nipples you want the one that is greater in diameter.
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
Make sure your blower fan is turned on and is blowing air. When you push your a/c button the yellow light should come on. If it is not blowing cool, it could be several things. Low on 134a or the control that has the a/c button on it could be bad or blown fuse, bad compressor, etc. If the air is cool but not cold the 134A is low. If it is still blowing hot, check and make sure that the clutch on the compressor is locked in. It most likely is not. Check ac fuses and ac relay, if they are good, check the 134a ,if low, refill it. This should fix it. Remember that if the a/c clutch is not locking in, you cannot add 134a because of no circulation.On some vehicles, if it is completely out of 134a, the relay will not trip and you will have to bypass the relay to provide power to the compressor to fill it. If you do all of these and it still does not work, you will need to take it to a professional. If you need to, reply back and I will give you more possibilities.(I think that you mean evaporator coil)
Need to leak check the system,recover the refrigerant, vacuum out all air & moisture, I would assume was put in there by any number of people trying to add to it over the years with no a/c experience & not using the proper manifold gauge set. Then charge to the correct number of onces
No it does not, you can add R134a to the low side of the system and when the low side pressure reaches the minimum psi the compressor will kick in. If you need to add more than 1 can then you may have a leak and will need to have it serviced.
Is your compressor kicking on? If it is not kicking on chances are that either your compressor is bad, you have a bad switch, or a blown fuse. Another thing to look into is whether or not your A/C unit is fully charged with 134a coolant. If your unit is not fully charged it will not blow out cold air. I hope this helps you out.
Small port is the suction side of the system. Make sure you have a gauge to monitor system low side pressure. Ambient temperature makes all the difference as to what pressure it should be when full. Probably between 25 and 40 psi.
you should be adding the 134a to the system the low pressure switch is doing its job by not allowing the compressor to kick on, it wont kick on until there is enough 134a in the system to be above the preset pressure for the low pressure switch.
It will normally come on by itself once you add the 134a if doesn't come on by itself I'm thinking you have a bad pressure swith in which is locacted in the A/C line in itself up on the passenger side by the firewall you can uplugged it there and jumper the 2 contacts together if the compressor kicks on it is either a bad pressure switch or there still isn't enough 134a in the system.