No. It will be less efficient.
Change the indoor filter, wipe the indoor unit down, and spray off the condenser
The coil that serves the inside of the house is called the indoor coil. The reason is that the indoor coil is a condenser in the heating mode and an evaporator in the cooling mode.. (pg. 1077)
http://www.goodmanmfg.com/Portals/0/pdf/SS-GSC13.pdf Go to this site. That site will give you the product literature, sure. But, that model is a Goodman straight cool (meaning not heat pump) 13 SEER 3.5 ton condenser (outside unit). Depending upon with which indoor unit this condenser was matched, the SEER for the system could be different.
That depends on 1) what indoor coil you have, 2) is the ductwork adequate to support 4 tons and 3) if the indoor coil and ductwork are suitable does the blower have the capacity to support 4 tons or 1600 cfm? If so it must be sped up.
There are 2 coils. 1 inside the indoor air handler or furnace and 1 outside on your condenser in the yard.
Dirty condenser coil, high ambient temperature, problem with condenser fan, overcharge, non condensibles, high indoor load are the first places I would look. In that order.
If the term "condenser" is reffering to the "condensing unit", the answer is yes. The combination of indoor coils and outdoor units is how the overall SEER is derived. The ARI website lists many combinations of these units.
ENERGY-EFFICIENT just took the quiz (apex)
If you are talking about the indoor evaporator coil being replaced when you replace the outdoor condensing unit than yes. Reason being the two are a matched pair. Most of the time the older indoor A coils are fit with an accurator or cap tubes as a metering device for the refirgerant. The newer condensing units are based on the A coil with a TXV metering device. In short a mismatched system will never perfom as it is intended. However many contractors still try to sell only condenser replacements.
You can buy an efficient power generator at your local Canadian Tire. For use indoor or outdoor. Other places are Home depot, rona, or at powerequipment.com.
Dirty condenser coils, high outdoor temp and heavy indoor load if coils are clean. Overcharge.
You don`t size a condensing unit to match your indoor unit. You size it to match the rate at which your house gains heat (heat load). Then you buy a matching indoor evaporator coil and set the fan speed on the indoor unit to deliver the proper cfm to support whatever size condenser the heat load calculation says you needed.