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Where to add C wire?

Connect to the junction of the yellow, blue, and red wires Since you have air conditioning, we can trace out the junction of the thin yellow and thin white wires to determine where your contactor ...
2 votes
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How do I remove a collector box from a rheem furnace

So all it took was a lot of force. Removing the screws was enough and I just needed to pull against the adhesive and it popped right off.
2 votes
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How to disinfect and clean a condensate water trap

Since it appears to be all plastic, and it's been removed, I'd soak it in a moderately strong solution of chlorine bleach for a day or two, per directions on the bleach, and scrub with a bottle brush ...
5 votes
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AC disconnect auxiliary/service outlet wiring

There is no need for a 120V circuit to be part of a mini-split installation. People often get confused by this because of a clause in Code. That is there to address the needs of the A/C maintainer to ...
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How far up a condensate line can sewage backflow go up into an HVAC system?

It appears from the drawings that the condensate trap is on the floor of the burner compartment, ie above the blower compartment and above the floor by some 18 inches or so. If the condensate tube is ...
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can I install an inline check valve on a condensate drain line down pipe?

You should cut the PVC condensate pipes shorter, and install a longer drain (more distance backflow has to come up before overflowing) leading into the P-trap, with an airgap for the condensate ...
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2 votes

can I install an inline check valve on a condensate drain line down pipe?

Yes you can install this as you want but, I am not sure it will work as you expect. Your condensate lines are not under pressure and rely on gravity fall for any water to exit them. Check valves ...
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AC blowing hot air

The solution was to look at the settings. The wires are used differently depending on if it is a heat pump or gas, etc. There is a setting that needs to be configured correctly to do so. I managed to ...
1 vote

120v vs 240v Mini Split Efficiency

Most U.S. utilities do not charge residential customers for poor power factor so there is little incentive for manufacturers of appliances to improve it. E.U. has PF regulations on all electrical ...
2 votes

Need a product to change my round HVAC damper and diffusers to square

Easily won't happen here. If you want to waste considerable effort and money on what appears to be a minor aesthetic change, you can do this. It will involve ripping into the ceiling to install round ...
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Why is this HVAC duct not connecting to the return?

I think that adding one off these at the bottom end of 3 will solve my problems. I will hook that to the home automation system together with the HVAC https://www.homedepot.ca/product/power-air-square-...
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3 votes
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Adjust Multi-Speed Carrier Furnace via thermostat as in manual, or need to rewire?

Unfortunately you do not have the "Automatic Fan speed control" However you can still change the Fan speed by charging the Fan Motor wiring. Obviously you would Turn Off the power and verify ...
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2 votes

Why is this HVAC duct not connecting to the return?

To answer the titular question of "why it's this way", either: Perhaps someone stopped work to ask whether or how to connect both 1 and 3 to the trunk and forgot about it. Get out your ...
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1 vote

New dehumidifier making rhythmic pulsing noise. How to fix?

Perform simple test. Set it on solid ground. Noise still there ? You build a boom box there that amplifies vibrations
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4 votes

Mini Split Leaking

If you want cold, you get drips. That is the reality of how thermodynamics works. Every evaporator (or on heat pumps, reversible condenser/evaporator) must have a drip pan underneath it. That is ...
2 votes
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Install C wire on dual zone hvac board for Nest - no c wire terminal

Your zone board doesn't use standard North American thermostats Unlike many zone boards out there, yours uses proprietary control heads that communicate with the zone board over a digital data link, ...
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Hardwood Flush mount registers and air flow reduction -how can you build large air returns that won't collapse and won't reduce the air flow?

Here is how I plan to do it The current floor is nailed in diagonal boards sitting on joists The floor will be removed the diagonal boards will be tightened and 3/8" plywood will be installed on ...
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HVAC Thermostat not powering on, blown transformer?

The 2 black wire are the same electrical point so you measure differential of potential (volt) between point a and b. When you measure between black wire, the results is 0 because are the same point . ...
8 votes
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HVAC Thermostat not powering on, blown transformer?

Somehow, the breaker swap put both hots on the same leg of the service From the wiring diagram (and the fact the transformer lacks a 120V input), we can tell that this is a 240V air handler. So, it ...
3 votes

Can I drill into drywall where HVAC duct lies?

Yeah, you can. Drill for the screw, though, not the anchor. If you hit metal immediately behind the drywall, just mount your camera to that. It will not hurt a thing. There are already many holes ...
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5 votes

Can I drill into drywall where HVAC duct lies?

Take off that vent grate and look inside. You should be able to see the depth of the vent boot that connects to the duct and make a reasonable determination of the amount of space you have between ...
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2 votes

Can I drill into drywall where HVAC duct lies?

Start by drilling a hole only 1/2 inch deep. Just enough to penetrate the drywall and not more. Now insert a long screw or nail to the depth of your planned anchor. If will feel any resistance then ...
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0 votes

Fan runs for heat but not ac

The basic operation is: For the Fan in the heat exchanger (sometimes called the furnace) that blows air through the vents. The Cooling should not run without Fan ! The Heating should not run without ...
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1 vote

Fan runs for heat but not ac

In most homes, the furnace is responsible for circulating air. It does not know the air conditioner exists. The furnace provides an air handling stack in which many OPTIONAL devices can be placed. ...

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