I am new to this forum. I recently have a new A/C system installed. However, it performs only marginally better than my 25-year old system, which is replaced by the new one.
It suffers the same problems with my old system:
1. Cool very slowly. The indoor temperature only drop 4F after running 3~4 hours
2. Runs 19~20 hours a day, when the ourdoor tempearture is 90~72F range and indoor temp is set to 75F, and it can not maintain the target temperature after 10:30AM the next day (the minimum it can maintain is 76F) and run continuously from 2:30PM till midnight, and from 10:00AM till 5:00PM the next day (I stop the system after that)
I observed pretty much the whol installation process and after I received manuals and read it later on, I found the following steps specified in installer's guide are skipped, which may be the root cause of the problem:
1. No Leak Check
2. No System Evacuation
3. No operational testing (air temperature, refrigerant pressure, outdoor air temp, etc) and I am not sure the freon is properly charged
I know skipping those steps are no good, can anyone point me to some resources that can prove how bad it can be?
Additionally, what is your typical experience of your A/C system? And what is your expectation of a new system? Specifically:
1. how long do you expect your room temp to drop to a comfortable level after you turn on A/C on an average summer day?
2. how long do you expect your room temp to reach your target temp and your A/C goes to an on/off cycle?
3. how many degree F do you expect your A/C system to be able to drop compare to an outdoor temperature of 91 degree F?
4. How many hours do you expect your A/C system to run on an average summer day (say outdoor temp between 72~91F, target temp set to 75F) if it's properly sized?
5. On the hottest day, how many degree F can your A/C drop compare to outdoor temperature?
Thanks in advance for any information and any advise on how to fix the problem.
[Edited by grandtiger on 07-10-2006 at 10:31 AM]