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Where can I get a schematic for a Coleman 3500A816 air handler?

I'm currently searching online. I'm trying to fix a broken down unit that continues to send power to the heat strip when the fan is not functioning. There are a couple of disconnected wires inside and I want to find out where they belong.

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  • Contributor
  • 69 Answers

With some units you must set thermostat to fan on to get the fan to run in heat mode.. or it could be a bad motor or fan relay . Generally in electric heat units one side of heater is always live then the sequencer turns heater on when thermo calls for heat.

Posted on Nov 30, 2014

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Posted on Jan 02, 2017

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farfield
  • 462 Answers

SOURCE: when I turn the air on the heat strips comes on at the same time

Is this a central heat? From the size i assume it is.
You say air conditioning on part of your question then use heat pump on another part. So it is important for us both be on the same page.
With all due respect some people think they have a heat pump and it is just AC and electric heat also but is not a heat pump.
. If you have the outdoor AC unit running with your thermostat set for heat and the air coming off the out door unit is cold, or you see it "steam up outdoors" off the out door unit at times (we call this mode defrost).

If you actually have a Heat pump system some times it is wired to have the strips come on at the same time the heat pump comes on especially if you experience a lot of weather below 40' occasionally and have an emergency heat setting on your thermostat you most likely have a heat pump.

If you have a heat pump for sure now the heaters can come on with the outdoor section if
1 they are wired to do so or
2 the thermostat has 2 stage heating and the second stage is telling the elements to come on, or
3 the outdoor thermostat (if so equipped) is telling the elements to come on.
Any 1 or combination of these 3 items can cause the elements to come on wit the out door unit.

Posted on Mar 12, 2009

  • 1 Answer

SOURCE: Wiring Diagram for Ruud Heat Pump

Unfortunately, the wiring diagrams for heat pumps are not so easy to come up with. The outdoor unit will have its own diagram, but may not include the indoor air handler and will probably not include the thermostat. That said, the orange wire is commonly run from the thermostat to the reversing valve in the outdoor unit. This wire is usually not connected to the indoor airhandler. The orange wire is usually used in a unit that has the reversing valve energized in cool. Ruud, however has its reversing valve energized in heat. Probably not useful but maybe helpful
Mike

Posted on Mar 26, 2009

  • 16 Answers

SOURCE: Goodman forced air gas furnace not firing

if your power vent moter is not running you should not have have glowing ignitor.Frist the vent moter must close an air prove switch in series with the idnitor .seems you have a stuck air prove switch.Its the one with a hose attached

Posted on Apr 07, 2009

co7196
  • 3433 Answers

SOURCE: coleman rv rooftop unit, fan runs in on but in auto nothing works

R = HOT 12V
W= WHT- GND
Y = YELLOW / POSSIBLE THERMOSTAT
G= GRND FOR THERMOSTAT
f = FAN
F=FAN
aSSUMING THIS IS A TWLVE VOLT SYTEM- The two f's Would be fan control intake and exhaust - fan direction
White is always ground and so is green.. green is more of a static ground where white is a load grnd.
Red is always hot. in low voltage

I hope this helped. No instructions in kit?

Posted on May 18, 2009

SOURCE: Wiring connection for a Ruud air handler & seeking its wiring diagram.

we are trying to install a goodman heat pump with a rheem air handler, the orange wire is hook up and the unit is still staying in the heat mood. does anyone have a wiring diagram for the air handler, their is some white wires in the air handler one with a purple strip and one with a black strip we need help

Posted on Aug 19, 2009

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