BR HVAC Recommendations

Comfort Control Heating and Air. Been using them for almost 20 years

A 4-ton unit for a 1600 sq ft house (400 sq ft/ton) that is only 6 years old seems over-sized, and if so it seems as though should should maintain your set point temperature even this this extreme heat. Does suggest to me you have either air flow issue and /or refrigerant issue, unless you have a massive leaky, poorly insulated house, which I could see for an old house, but not one 6 years old. Note: I have 4 ton unit on a 2500 sq ft built in 1993 and it is sized properly based on manual J heat load calculation.

I’ll give you a suggestion for a tech - Tom (don’t know his last name) with Ram Air in BR. He is originally from NY state - so if you called Ram Air you’d have to specifically request him - I’m assuming he still works for them - he did last year. He’s one of their senior techs. When I had an issue, first thing he did was to go into attic drill holes in return plenum and the furnace downstream of the blower motor to check static pressure - this to make sure unit air flow in CFM was correct, then he checked the temperature split between the return plenum and supply plenum (before air cold enters the ducts). These are things a tech should ideally should do before checking refrigerant pressures. Once he verified air flow as being correct, then he checked refrigerant pressures, sub-cool, superheat readings and then he properly charged the unit. First and only tech to ever do this in the 30 years I’ve been in this house.

Total Comfort heating and air.

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Comfort Control Heating

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How are they price wise compared to say accutemp?

Other things to consider:

I assume you have one dedicated return (where your filter is). If you leave doors closed, you can starve the return duct of air flow. The return will then pull air from the attic or from outside (thru leaks) to make up for the loss. I’ve tested air velocity leaving my supply registers and there’s a substantial reduction when doors are closed.

I’ve also seen poorly installed ductwork. Flex duct that is pinched, duct exiting the end of the plenum, etc.