Basement a/c capacitors

[ste1148watt]

RE: Itasca basement ac/heat pump.
Looking to replace capacitors #1499-573. Existing capacitors show 45uF +- 10%..... new ones 45uF +- 5%. Is this an issue? Thanks

 

[Wasillaguy]

The tolerance % is not an issue. But you must check voltage rating.
New cap must be rated same or higher voltage than original.

 

[John Canfield]

The tolerance % is not an issue. But you must check voltage rating.
New cap must be rated same or higher voltage than original.

5% is the tolerance - that means the capacitor can actually measure 105% of rated value or 95% of rated value. 5% tolerance is 'better' than 10%.

 

[Ray-IN]

I just replaced all 5 caps in the electrical box, even though the originals were only 24 years old. Be advised, if you don't buy Mallory replacements, other brands have a larger physical size and may not fit in the limited space in the electrical box; look before leaping.
Tried the system and the indoor fan cap requires replacement too. Shucks, gotta pull the basement unit out, gotta find help, at 80 I'm not trying it by myself. (had both shoulders broken)

 

[John Canfield]

I have a while to go to hit 80 but I'm finding that I need help with some physical activities (I have two new knee joints and a new shoulder joint.)

The number two compressor on my basement air needed to be replaced so I pulled the unit and while it was out I replaced all of the capacitors (also the hard start relays) and relocated the condenser fan cap to where it could be replaced without pulling the unit. Talk about a brain-dead design .

 

[Ray-IN]

Had time to do a bit of testing today John; fan motor is running very slowly. Could still be a bad cap, motor or dry shaft bushings dragging after sitting for a year unused. When the indoor fan motor starts, the initial surge is 3A, then falls to running amp-draw is 1 amp. That leads me to suspect the shaft bushings.
The service manual makes it clear how to follow the trouble-shooting tree.
I was inspecting the mechanics of removing the unit and it appears the unit cannot drop straight down or it will hit the outside metal framework that protects the 6535 from damage, plus that framework is where the dress grill attaches to the MH at the bottom.

More inspecting in the future when I get time. It's a good project for a rainy day, but no rain in the forecast for the next 10 days. Owning a hobby farm, isn't a hobby @ 80 it's work. Dr. wants me to have shoulder replacements, I said nope, just keep giving me those cortizone shots every 4 months to ease the pain and I'm good.

 

[John Canfield]

I bought a lift table to use for removing/working on/installing the basement AC - thank goodness. It was the right tool for that job and I've found the table very handy once in a while. I also used it when I replaced the coach water heater.

My condenser fan bearings seemed fine but I oiled them via the little orifice. Duner (Bill) replaced his with ball bearing pillow block, I considered that but decided enough was enough as far as rehabbing the unit.

As far as the shoulder - I'm very happy I had my joint replaced but therapy was painful and a lot of work but after a year or so I couldn't tell it apart from my still good one. So that was a total success.

 

[SCVJeff]

I have a while to go to hit 80 but I'm finding that I need help with some physical activities (I have two new knee joints and a new shoulder joint.)

The number two compressor on my basement air needed to be replaced so I pulled the unit and while it was out I replaced all of the capacitors (also the hard start relays) and relocated the condenser fan cap to where it could be replaced without pulling the unit. Talk about a brain-dead design .

I can hardly wait…