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11 votes

Water in attic AC air handler pan

Sounds like: The condensate drain Is clogged. That's always made out of small pipe (too small for drain use otherwise) that's prone to clogging, by AC installers who enjoy being called back for more ...
Ecnerwal's user avatar
  • 218k
9 votes
Accepted

Why would multiple air conditioners fail?

The common thread to all 4 new units AND the old unit is the power supply. I would look at that for proper voltage , ground and neutral. The problem could be the outlet it is plugged into ( ...
RMDman's user avatar
  • 30.9k
6 votes

Could replacing capacitor have caused a leak in my whole house AC unit?

Anything is possible if you have a technician who doesn't know what they are doing. However, a capacitor is a simple electrical component and normally can be replaced without working on the ...
manassehkatz-Moving 2 Codidact's user avatar
4 votes

Two 40uF to equal 80uF capacitor for AC unit

A picture would be helpful to confirm, but yes, two capacitors in parallel add simply, so if two 40's are in parallel they are equivalent to an 80, and an 80/5 should work if that's what's called for, ...
Ecnerwal's user avatar
  • 218k
3 votes

WiFi Install no C Wire for thermostat or control panel

The (appliance-internal) Brown wire is your C wire. To bring the C wire to your room thermostat, re-purpose the blue wire in the white cable running to the thermostat to be the C wire. Disconnect it ...
Bart van Ingen Schenau's user avatar
3 votes

Is it safe to run the AC for a extended time, when the condenser breaker is off?

Upgrade your thermostat. Most thermostats have a "Fan Only" switch to do exactly what you want, however, thermostats are sold in many grades of product "good/better/best" and the &...
Harper - Reinstate Monica's user avatar
2 votes

In need of small HVAC duct solution

This can be done fairly easily with just a new rectangular duct cut to fit. Procure a new rectangular duct in your desired size. It should be as long as your extension will be plus several inches. ...
isherwood's user avatar
  • 139k
2 votes
Accepted

Need C-wire for new Honeywell RTH6500WF Thermostat

If you can, run the Brown wire coming from the transformer to the thermostat. That would be your C wire.
Traveler's user avatar
  • 17.7k
2 votes

In need of small HVAC duct solution

Whatever you do will require some sheet metal work, either by you or others. For DIY, the transition from rectangular to square is the most difficult part of the fabrication. You would cut two 5&...
MadMonty's user avatar
  • 1,172
2 votes

Water in attic AC air handler pan

I should note that your pan should have a fill sensor that cuts the unit off if the pan ever fills with water. If you don't have one, I would get one installed. You could have had a lot of water ...
Machavity's user avatar
  • 24.9k
1 vote

HVAC Keeps tripping breaker. Noticed my breaker is less than then Max on the side label - should I change?

The unit that is tripping has: Minimum Circuit Amps: 29.0 Max. Breaker: 50 Existing Breaker: 40 As a general rule, the minimum breaker size for HVAC is the equipment requirement (29.0) plus 25% for ...
manassehkatz-Moving 2 Codidact's user avatar
1 vote

Can HRV be filtered on the outgoing side? Ducted?

There are absolutely ways to clean a HRV (Heat Recovery Ventilator) If I were facing this situation, I would attach the HRV to a plenum and a return grill with a filter. That would be a simple setup ...
KMJ's user avatar
  • 11.8k
1 vote

Water in attic AC air handler pan

Reading what you wrote: "I remember seeing the thermostat entirely blank before the event". "The AC ran constantly for a day". "Next day air will not blow". "I shut ...
grahamj42's user avatar
  • 208
1 vote

Blown AC Disconnect Fuses Different

If it is truly "just" a disconnect, then the two fuses should match but it probably doesn't matter what they are as long as: At least as large as the circuit breaker protecting the entire ...
manassehkatz-Moving 2 Codidact's user avatar
1 vote

Splicing dehumidifier drain line into AC drain lines

Keep the secondary dry. splice into the primary line using a wye, if anything goes wrong the AC will drain using the secondary line, and hopefully someone will notice water flowing from the secondary. ...
Jasen's user avatar
  • 21.5k
1 vote

Understanding the concerns with vented to unvented retrofit of attic

There are just really two components: How much is this insulating my attic? How much is this helping my home? For #1 you need to install some sort of radiant barrier like atticfoil. There are ...
DMoore's user avatar
  • 49k
1 vote
Accepted

Understanding the concerns with vented to unvented retrofit of attic

Your proposal of insulating with solid poly panels is completely feasible with very little to no chance of condensation. It is common in much of Florida where the weather is hot with a few months of ...
RMDman's user avatar
  • 30.9k
1 vote

In need of small HVAC duct solution

As a DIYer, not an HVAC pro, feel free to take this with a grain of salt. (Also, hopefully I understand your problem.) I don't think there's a standard part that will work for you to convert a 10x6 ...
Huesmann's user avatar
  • 3,645

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