Loud whistle when my 2.5 ton outside unit turns off

EPA regulations: Freon 22 units are no longer available, Units that are compatible are available They come pre charged with nitrogen It must be dumped. If there is freon in the old system it should be pumped down into the condenser unit before the inside unit is removed, Close the high side king valve and run the unit until the low pressure reads near O Close the low pressure king valve. and turn unit off. 410A freon units are readily available. Most if not all 2 ton air handlers will work with any outside 2 ton unit though some building codes will not allow a mix. Their reason: if something fails who is to blame:

can be a bad fan motor, defective capacitor or contactor issue. capacitor is cheapest fix if bad.

one of the cabin seals has come lose or part of the plastic under the windscreen has a gap, can happen with plastic. just need to reseal the gap or refit it and seal at the same time. its body panel sealer can get it in a tube for a sealer gun or you can get the brush on type from most car part stores.

Theres many holes on the fire wall for the wires to come through from the engine to behind the dashboard, one could be missing the rubber around it or one could be missing, also you may likely have a leak on your windshield, you can get some black silicone and patch it with it, same for the dashboard.

Hello, if the outside condenser is 2 ton than the inside evap coil should be 2 ton aswell. There are 12,000 btu's per ton and the number 024 in the model # represents btu's per ton so you have a 2 ton unit.

First off - the 'rule of thumb' is 600' per ton of Air Conditioning. In other words your old unit is a 2 ton unit. So - 2 tons x 600' = 1200'. As you can see if you install the 2.5 ton unit - you will be installing a AC that 'could' cool a 1500 sq ft house (2.5 x 600' =1500 sq ft.). Slightly more than what you need; and the 3.5 ton unit is 'way to big,' (3.5 x 600' = 2100 sq ft.).

Note: fyi - many in the AC business will sometimes refer to tonnage in btu's, i.e. 1 ton = 12000 btu - hence a '2 ton unit' can also be referred to as a 24000 btu unit and vice versa.

So... from the above - you can easily see that "2 tons" of Air conditioning is what is required to cool the 'average' home of 1100 sq ft. "roughly speaking."

Note: it is always best to have a professional 'size' your cooling/heating needs.

One of your questions was could you 'mix tonnage?'

The answer is 'usually you don't mix the tonnage of your outside/inside units.' However, professionals sometimes do (mix the tonnage) in certain situations, and installing a 2.5 ton outside unit with an existing 2 ton inside unit is often done, however, there are some 'tech issues' here and - I would "again" recommend that you call a Service Tech to help you with the sizing/mixing of your cooling/heating needs.

hope this has helped

I have a wiring diagram I can send you. I took a picture of mine. Mine is a Ruud Achiever PNE 2 ton.

This is called an "A" coil. You need a 5 ton "A" coil to match your outside unit, give or take 1/2 ton. The cost will vary greatly depending on the make of your unit.

Greetings jdreisbaugh,

The tonnage is usually found on the name plate on the condensing unit outside. 12000 btu = 1 ton, 24000 = 2 ton and so forth. In your case the unit is 36000 btu, therefore a 3 ton.

I hope this helps!
Dorothy
Go Ahead. Use Us.

It may be the small vent fan motor on the inside if the control panel. When the noise begins remove the panel and you may be able to catch it in the act.