AC Blower, Cooling & Heating Synchronized?

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  #1  
Old 10-15-07, 07:48 PM
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AC Blower, Cooling & Heating Synchronized?

Have a Goodman AH30-08C Handler inside with an outside compressor unit. Installed new blower, 24VAC transformer and Non-programmable Honeywell digital thermostat. When I turn on the breaker at the handler (with the thermostat cool/heat selection to "off" andthe fan on "auto"), the fan turns on and continues to run until I switch the thermostat to either cool or heat. Within 30-seconds of doing this, the fan cuts off and I get either heat or frosty coil. But the fan never cuts back on to take the cool or heat through the duct... it just sits there and gets cool or hot. As soon as I turn the cool or heat off, within approximately two minutes the fan turns back on again. Also, there seems to be no change when switching the fan control on the thermostat from "auto" to "on". Yes, the outside unit is turning on.

HELP...
 
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  #2  
Old 10-15-07, 08:01 PM
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What model T-stat was placed?

Why new blower, t-stat, and transfromer at the same time??
 
  #3  
Old 10-15-07, 08:08 PM
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RTH3100 is the t-stat. Just bought house, prev-owner said he had a guy come check it out when it wasn't working right (what wasn't right, I don't know). When he did something with the wiring, the motor smoked and wouldn't come on again... I replaced motor first and then found the transformer wasn't putting out 24VAC. Took it out and smelled burnt dielectric... got the results I described initially and thought a timing circuit might be the problem and replaced the thermostat.
 
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Old 10-15-07, 08:27 PM
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Undo the t-stat wires at the board, and turn on the system.

Nothing happens?

if nothing happens, start over by wiring the low votlage

R--red-- R

w--white---w

g---green---g

y---yellow---y

c----blue---c (if you have extra wires)


If it still acts up, then the board may be bad.

What model of furnace do you have?
 
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Old 10-15-07, 08:39 PM
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Mistake in last thread I sent... the Model is Goodman AW30-08C. All I know is that it's a combination electric AC & Heat.
 
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Old 10-15-07, 09:02 PM
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AW30 is your outdoor unit, what is the furnace?
 
  #7  
Old 10-15-07, 09:06 PM
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Will have to look for that number tomorrow, not moved in yet... will also verify wiring as you said previously. Thanks.
 
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Old 10-16-07, 02:04 PM
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Wink

combination electric AC & Heat.
Is this just electric heat or do you have a heatpump there???
 
  #9  
Old 10-16-07, 07:29 PM
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The outside compressor unit is Model # CPE24-1AB (or) 14B, but doesn't matter at this point - I got it figured out!

Turns out that other guy had moved wiring and not put it back right... the BTDR (Blower Time Delay Relay) was reverse wired.

Thank you for the help.

Dave97
 
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