[retiredguy123]

Some home inspectors, like Frank D'Angelo, have a heat sensing tool that will tell you if the bedroom ceiling is insulated without going into the attic.

[PJ_Smiley]

We have 3-beroom courtyard villa (1600 sqft). Had same problem with master bedroom - not as cold as the front bedrooms and rest of house. We had HVAC company install a second A/C air duct for master bedroom. Both air ducts run from larger duct box nearer the front of house (like a direct run). Originally, the duct in the master bedroom was centered on ceiling closest to living room/bedroom wall. In our case, with tray ceiling, the vent sat in the higher part of ceiling (centered) between the tray and the wall. We eliminated that vent hole and installed a vent on each side (for esthetics) and had the original hole patched, spackled, and painted. The ceiling and vents looks like it came that way. With two A/C ducts, the master bedroom stays cooler and has better airflow.

[azcindy]

Originally Posted by PJ_Smiley

Had same problem with master bedroom - not as cold as the front bedrooms and rest of house. We had HVAC company install a second A/C air duct for master bedroom. Both air ducts run from larger duct box nearer the front of house (like a direct run). Originally, the duct in the master bedroom was centered on ceiling closest to living room/bedroom wall. In our case, with tray ceiling, the vent sat in the higher part of ceiling (centered) between the tray and the wall. We eliminated that vent hole and installed a vent on each side (for esthetics) and had the originally hole patched, spackled, and painted. The ceiling and vents looks like it came that way. With two A/C ducts, the master bedroom stays cooler and has better airflow.

That's an interesting idea. Will ask about it

[CarlR33]

Is the register open and blowing cold air? Do you have a ceiling fan in the bedroom and is it blowing down (counterclockwise), how often are you changing your HVAC air filter? The only way fresh air supply ducts could even get dirty is via their supply air via the air filter? I never understood how a fresh air duct could need cleaned (or even be dirty) unless the filter was missing, very cheap or never changed? You can also get a remote thermostat for the bedroom connected to the main thermostat but I would probably consult a HVAC tech if all the other stuff has checked out vs. wasting money on duct cleaning, IMO.

[retiredguy123]

There is no reason for a bedroom to be 3-5 degrees warmer than the rest of the house in a courtyard villa. Something is wrong and it most likely has something to do with the air flow. I have a courtyard villa. The temperature in my kitchen is 79 degrees and the temperature in my bedroom, on the opposite end of the house, is also 79 degrees.

Note that my air handler has three settings for fan speed: low, medium, and high. Mine is set on medium, and the heating and cooling modes are set on automatic, which means that the supply fan only runs when the system is heating or cooling. I don't recommend running the fan continuously. I use a MERV 11 filter in my unit, which I replace every 6 months. The system is a Carrier, single stage system, installed by Munn's for the builder.

[MrFlorida]

Cleaning the ducts will not make the air colder.

[Topspinmo]

If you’re air handler in garage and master bedroom way at back I suspect low air flow and conditioned air warmer do to length of duct leading back there. I had same problem and tried several things with little success. The air just hotter due to distance from air handler and low air flow due to smaller ducting.

I used mini anemometer

Amazon.com

And temperature gauge trying to adjust air flow opens in living room to more flow to back bedroom. I also tried speed air handler fan up with little success. Good luck, if find remedy without adding mini split in back bedroom lets us know?

[Normal]

Make sure your duct is connected to the air register in the bedroom. Sometimes they come loose or pop off. Clues would be insulation dust in the room or a cooler than usual attic when the AC is on. Make sure air is coming out of the register with the AC on.

[callalily]

When the sun is shining or the air conditioning system is working hard when it is scheduled to decrease the temperature at night, I can get a 3-5 degree difference in room temperatures between one end of the house and another. I purchased Ecobee Smart Sensors and have them in each of the bedrooms and the kitchen. I can adjust the A/C so that it will pay attention to only one sensor or a combination of them at different times of the day. So, for example, my primary bedroom is furthest away from the air handler and it is normally just me sleeping here, so I set the system using the Ecobee app so that the primary bedroom is 73 degrees at night. It doesn't matter what temperature the other rooms are (they're usually colder). It will keep the primary bedroom at a steady temperature. During the day, it pays attention to the temperature in the kitchen plus one other room. Since the guest rooms are closer to the A/C, they are generally colder, but that is what my guests prefer. Amazon.com

[Altavia]

Originally Posted by azcindy

I am having Sun Kool do the ducts since they installed the air conditioner originally and I had signed up for their Kool Club. I hope they are aware of the flexible duct issue?

Suncool had the tools to diagnose and knows how's to balance there ducts

[golfing eagles]

Temperature in primary bedroom 3-5 degrees higher than rest of house?

My MASTER bedroom is in the back of the house and only 1/2° warmer.

[New Englander]

Originally Posted by MrFlorida

Cold air has to travel further through a hot attic to get to the back rooms, therefore they will be warmer.

[azcindy]

Originally Posted by callalily

When the sun is shining or the air conditioning system is working hard when it is scheduled to decrease the temperature at night, I can get a 3-5 degree difference in room temperatures between one end of the house and another. I purchased Ecobee Smart Sensors and have them in each of the bedrooms and the kitchen. I can adjust the A/C so that it will pay attention to only one sensor or a combination of them at different times of the day. So, for example, my primary bedroom is furthest away from the air handler and it is normally just me sleeping here, so I set the system using the Ecobee app so that the primary bedroom is 73 degrees at night. It doesn't matter what temperature the other rooms are (they're usually colder). It will keep the primary bedroom at a steady temperature. During the day, it pays attention to the temperature in the kitchen plus one other room. Since the guest rooms are closer to the A/C, they are generally colder, but that is what my guests prefer. Amazon.com

This sounds like a good solution to get the temp in the bedroom right at night. Still may ask Sun Kool when they are here why there is a 3-5 degree difference in the rooms.

[Babbs1957]

Originally Posted by azcindy

Thanks. I am scheduled to have the ducts cleaned on Monday. I do keep the bedroom door open. Fingers crossed the duct cleaning solves the problem.

Oh my...you need to do your due diligence on duct cleaning. Have them show you their borescope video while in your ducts prior to work. I think you would reconsider. Been in the business for 30 years, never came across a home duct system that needed cleaning. It is sorta like cleaning your water pipe lines to get stronger pressure.....scam.

[PilotAlan]

There’s a lot of speculation here. Get someone to inspect your ductwork in the attic.
There’s a lot of things that can cause this (leaking ducts, damaged ducts, poor insulation, poor design, poor installation, etc) and you won’t know until someone with knowledge goes up and looks at it.