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Posted by udarrell on May 16, 2007, 8:42 am
sushil_rijhwani@hotmail.com wrote:
>I have a 8 year old York AC unit (10 SEER) in my house. (clipped)
>
>Option 1) Charge the system and live through this summer - runs the
>risk of recharging depending upon the rate of leak. Price estimate
>$100
>
>Option 2) There is a lot of rust around evaporator coil so replace the
>evaporator coil. Since the requirements have changed, he suggested
>that replacing coil will also mean replacing the condenser unit (both
>13 SEER) to ensure compatibility. Price estimate ~$3000 for parts and
>labor.
>
>Option 3) This evening I called an authorized York dealer and he said
>that they still can replace the 10 SEER evaporator coil for a price of
>~1000 (not to exceed $1200) part and labor. They will not sell the
>coil separately (I guess warranty issues?). Since the furnace and coil
>is located in the attic, he said that this job would involve 4-6
>hours of labor and following steps
>a) recovery of freon from the system
>b) Replacement of evaporator coil
>c) leak testing and evacuation
>d) Freon charge and testing
>The new evaporator coil will come with 5-years warranty and if I want
>to have it replaced, he will come out to take measurements. The coil
>is likely to be a stock item or can be ordered and received in a
>couple of days.
>
>I am reluctant to go with option 1 of freon charge as it is a
>environmental and health hazard. So far option 3 seems the best as it
>is cheaper and fixes the problem that needs to be fixed. However, the
>life of the condenser does bring up some questions i.e. has the low
>freon pressure caused some damage? How long would a condensor unit
>last? If the condensor unit breaks down, would that mean replacement
>of the evaporator coil again as the new standards have jumped to 13
>SEER? (YES)
>
>I was wondering if the experts on this forum can comment on the
>pricing of these options and offer advice on the options/concerns to
>deal with this issue. Thanks Sam
>
>
Depending on a number of other factors, a 13-SEER coil with a TXV
refrigerant control would probably work.
It will hold more refrigerant and require more space.
Do NOT take my advice, ask every contractor in your area you can about
the best options!
http://www.udarrell.com/proper_cfm_btuh_duct_sizing_air_conditioning_systems.html
- udarrell
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