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check the velocity at the diffuser neck, it shall not more than 4m/s ,

it looks you oversized the TVX, maybe, you can move the bulb senser in the middle or somewhere of the evaperator, to solve the problem.

no, I am in Canada right now

yes.

Yes, Use The Room Temperature To Control The Fan On Or Off IN WINTER.

I see, so the best way is to buy a thermostat to auto control the fan.

low super heater, high suction pressure, if the unit using capillary, it is the typical for overcharge.

I Am In Canada, I Am Chinese, I May Be Able To Help You.
1. The A/c Can Not Run Because Of It Is Too Cold Outside, A Freeze Stat Something Like That Keep Open.
2. The Fan Is Designed For...

up:):p

air in the system,
over charge
unsized unit

and so forth

:)

did someone take the red seal exam at Calgary, I will take the exam soon,
so I am wondering what they asked about

big problem!!!, the gas valve may be leaking, find a techanician to solved it right now,

How about install a boost fan in the return air duct. it may cost less.
only thing you have to consider is coose the right size boost fan

The Rtu Economizer Generally Work The Way Below:

1. Call For Cooling-----economizer Check The O/a Temp.---yes-- O/a Damper Opening And Return Air Damper Closing---check The Mix Temp. ----yes---...

It Looks That The Motor Is Runing, But The Compressor Not Working.

Call The Manufacturer For Help

probably the lack of refrigerant, check the pressure, check the bubble

Does The Condenser Have A Good Ventilation, Or It Is Too Hot?
I Think The Condenser Unit Does Not Work Well

Thank your guys

answer me please,
I would appreciate you
regards

I am trying to use one two-stage stat to control two RTU , so that they can work just as one two-stage RTU

Can somebody can let me know how to connect the wire?

Thank you ahead

my idea is:
if you have space,you need not rid out of the 11x4 duct,you can plus an other duct parallel the 11x4 duct.
the first thing is that you'd better knowing the correct size duct you need .