Q&A

2004 Mercury Sable

Question: A/C blows hot

Question

Bay_Auntee, 3.0L V6, Fort Worth, TX, June 17, 2011, 19:37

 Rookie

I had put in stop leak for a/c and then added 1 large can of freon and 1 small can.... it still blows hot.... and the compressor is coming on and going off??? Spent 80.00 :(... do I need more 20.00 can of freon for small? or or ... HHHEEELLLPP... :) ty

2 Answers

Answer It

Flag This

Follow this Question Unfollow this Question

• Answer #1

  DaveJHM June 17, 2011, 22:05
  

   Master

  Stop spending the cash on something you may not need! Help indeed...

  Being very careful, follow the air conditioning lines back to the firewall. As they go into the accumulator (receiver/drier) and then into the firewall (evaporator), they should be very cold with the system running a bit. If they are in fact cold, then your problem my lie inside the vehicle with the temperature control mechanism.
  Flag This
  Like0
• Reply

  Bay_Auntee, June 18, 2011, 07:09
  

   Rookie

  ok went out this morning and it is not blowing hot but not as cold as should be.... Wonders if 1 more can will do it? :)
  Flag This
• Reply

  DaveJHM, June 18, 2011, 10:59
  

   Master

  I'm really sorry -- adding refrigerant blindly to the system is not advisable! You need a set of gauges to measure system pressure. You are probably just adding refrigerant the vehicle doesn't need, and then it vents off.

  On the other hand, your "stop leak" could have caused a system restriction, and may have begun a new problem.

  It's just all too much to guess at. You'd be better off doing nothing and living with it rather than wasting more money for something that will not fix it.
  Reply
  Flag This
• Answer #2

  Bankston Ford-Mazda of Fort Worth (3568 Answers) , Fort Worth, TX - (682) 200-1036

  Bankston Ford Mazda Ft Worth June 20, 2011, 06:04
  

   Enthusiast

  The proper amount of refrigerant must be exact. Too much can be as bad as too little. Then your system pressure must be checked. If the air is blowing but not very cool, it can be leakage, restriction, engine temp., mechanical failure or possible electrical. it's best to have trained techs check these.
  Reply
  Flag This
  Like0

• a/c blows hot air what to do
  my a/c is blowing hot air and the comperssor is working and it has feron we think it could be a door stuck and not leting cold air in what should we do we cant afford somebody to fix it for us.

  Q&A > Mercury > 2000 Mercury Sable

• a/c blows cold full charge but intermit blows hot and then cold after a few min
  a/c blows cold then no cold sets a few min and then will blow cold again ,full charge no pressure reading problems, intermit operation

  Q&A > Mercury > 2008 Mercury Sable

• climate control
  Climate control consistently blows hot air, no matter what the temp. setting. The blend door has no physical restriction & the module to actuate the blend door scans OK. Any further ideas as to wh...

  Q&A > Mercury > 2002 Mercury Sable

• A/C does not work ...
  ...ble 4D GS 3.8 & the fan blows hot air in the A/C position. Any thoughts on possible problems & repair costs ? Peter Hendersonville, NC

  Q&A > Mercury > 1993 Mercury Sable

• what causes my a/c to be blowing hot air only
  had system checked, found it was not holding a vacuum of 29inches.I then used a leak detector which showed up green with a strobe light, saw where this fluid was leaking through a switch connected ...

  Q&A > Mercury > 1995 Mercury Sable