Question about Heating & Cooling
There are many parts of a cooling system - any one of them could be failing and causing the problem you describe. Any qualified HVAC professional should be able to quickly assess the problem and make recommendations for you.
Some common problems include: poor power (low voltage), faulty condenser fan, faulty evaporator fan, dirty filters, dirty evaporator coil, dirty condenser coil, faulty expansion valve, contaminated refrigerant, over or under charged, undersized unit for the space to be cooled, wrong program in thermostat (times, days, temperature, heat or cooling mode, etc.) and more.
If you asked for a technician simply to "check the refrigerant" - that may be all he did. If you ask a tech to "determine what the problem is" - you allow him to do more than simply what you ask him to check. Let him do the all the work he needs to do to determine the source of the problem. Good luck!
Posted on May 07, 2014
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Posted on Jan 02, 2017
Is this an electric or gass furnace - Eather of these can can have this problem its most recomendable that you call a seviceman .
in the case of electric furnace you may requier a new heat sequencer. And in the case of gass you may requier a new relay.
Posted on Feb 19, 2009
open the service panel to check for control voltage of 24volts when tstat calling, The contactor should be pulled in, if contactor is down,and contacts appear to be clean, and the unit is still not running, it is a bad compressor. to test this unplug the black wire from the compressoror at contactor,w/ power off! Turn on power if fan works normally it's a bad compressor. However if you see a swollen split cap(5 wires to a soup can looking w/ the terminal C,F,and Comp), switch it first and start at square one.
You also need to consider the high pressure switch if its cycling on off on off.
Posted on Mar 12, 2009
DOES THE HOUSE FEEL DRIER IF IT IS 80 OUTSIDE WITH ALOT OF HUMIDITY THE UNIT WILL RUN FOR A LONG TIME TO REMOVE THE MOISTURE(HUMIDITY) OUT OF THE HOUSE BEFORE TEMP DROPS DRAMATICALLY IS THERE WATER COMING OUT OF THE DRAIN PIPE OUTSIDE
Posted on May 03, 2009
Okay. Here's what I suspect in order of probability:
- low refrigerant charge
- contactor not getting 24 volts from controller (controller problem)
- bad contactor
- bad capcitor
I'd start with the charge, as suggested by mastatech. But if it is low, you'll need a service call, anyway, so pressing the needle valve may not be necessary.
I'm assuming you're not going to be taking the unit apart and testing stuff, so you'd need a service call for that as well.
I guess bottom line is, call for service. At least, I think we've ruled out simple stuff which will avoid paying for a service tech to come out and flip a switch.
Maybe mastatech has some other recommendations.
Posted on May 10, 2009
If you have ice on the Line you are iced up. If coil is iced no air can get thru. Now First. Turn of ac and turn fan to on posotion. That will thaw unit. Let it run 45 minutes. That should do it. If the fan is not running you amy have a bad fan relay. One of the reason iced up unit is dirty evap, coil inside. Try to thaw it out first. You can clean the coil with a stool brush. Does not damage the coils. Good luck
Posted on Jun 09, 2009
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