1. Sunday afternoon we get home and the house is 84 degrees. Ground floor unit fan not running, obvious Texas summer time blown capacitor.
2. Call the repairman for a Monday morning appointment. Sure enough my assumption was correct. Up and running in thirty minutes after a hefty bill.
3. Mid-day Monday all the rooms in the house are cool, except for the master bedroom, which is getting warmer. It got up to 79 during the day and cooled off during the night since we opened the bedroom door to let some of the cooler air from the living room in.
4. This morning, in between work meetings, Im able to shower and get ready for the day. Drying off, I notice there is cold air pumping into the master bedroom/bathroom.

Spoke to technician and he made a guess that damper in the duct that feeds the bedroom/bathroom must have shut during the capacitor episode. What he couldnt explain was how the damper opened backup. Could it be a fully charged and functioning capacitor provided enough juice to re-open? Maybe a pissed off relay or switch in the unit? Im just gueesing here. Would be nice if a good Ag could help to explain.

Thanks,
Tim C/O 2000

I have no explanation but suggest you will have a better chance posting this in the Home Improvement forum.

Oh man. Thanks. Been a longday with this, work, and great friend in hospital after having to be resuscitated.

Definitely agree with this and the above regarding getting a replacement before you actually need it. Should only be $15-$25.

I was surprised to find out that Home Depot actually carries a decent selection of capacitors in stock for not that much more than Amazon or an HVAC supply house.

Swapped out capacitor two days ago, worked great. Now have an extra capacitor and also contactor on hand just in case. Also ordered a soft start for compressor longevity and for future backup generator.

pillow said:

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1. Sunday afternoon we get home and the house is 84 degrees. Ground floor unit fan not running, obvious Texas summer time blown capacitor.
2. Call the repairman for a Monday morning appointment. Sure enough my assumption was correct. Up and running in thirty minutes after a hefty bill.
3. Mid-day Monday all the rooms in the house are cool, except for the master bedroom, which is getting warmer. It got up to 79 during the day and cooled off during the night since we opened the bedroom door to let some of the cooler air from the living room in.
4. This morning, in between work meetings, Im able to shower and get ready for the day. Drying off, I notice there is cold air pumping into the master bedroom/bathroom.

Spoke to technician and he made a guess that damper in the duct that feeds the bedroom/bathroom must have shut during the capacitor episode. What he couldnt explain was how the damper opened backup. Could it be a fully charged and functioning capacitor provided enough juice to re-open? Maybe a pissed off relay or switch in the unit? Im just gueesing here. Would be nice if a good Ag could help to explain.

Thanks,
Tim C/O 2000

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I had an issue like this in my former house which had a dual zone AC system. The upstairs wouldn't blow any air at all. It turned out to be a little motor that controls one of the dampers for directing air upstairs went bad. It was relatively inexpensive to replace that little damper motor to fix the issue.

It's possible you have one that is starting to go bad and is getting stuck in the open or closed position. Mine would randomly open every now and then until eventually it stopped opening at all.