Question about Dometic Rooftop RV Air Conditioner

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Suburban SF30FQ furnace doesn't run. Has power to unit and can hear relay click in unit when call for heat but blower does not run.

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  • Dometic Master
  • 6,674 Answers

Please give make, model, year etc of RV that furnace is in. Thermostat on wall operates heat and cool?

Posted on Nov 29, 2013

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Posted on Jan 02, 2017

  • 68 Answers

SOURCE: ATWOOD MOBILE FURNACE RUNS WHEN IT WANTS/

Check your furnace for power. will be 4 wires. power ground and 2 thermostat wires. Check for power at the time delay relay, if you have power there check for power going in the fan motor, if power in motor wire, motor is bad. If no power in motor wire and power going to circuit board take the 2 thermostat wire apart and wrap the 2 together comimg from the thermostat. Fan will stat in about 30 seconds. If it does you need a control kit in the ac. But sounds to me like you have a furnace problem.

Posted on Mar 19, 2009

MNfisherman
  • 11896 Answers

SOURCE: unit runs fine until it reaches temp and then you

Sounds like either the temp unit or sensor may need to be replaced. You should also check the resistance of your relays with a multi-meter to check that they are not causing the problem. Checking the power from power-supply would probably be a last thing to check for.

Posted on Jul 17, 2009

motor1258
  • 6674 Answers

SOURCE: Air conditioner won't run. when

That hum making the lights dim as well I suspect sounds like compressor trying to come on. Are you sure you have a good 120volts coming in to RV?

Posted on Jul 28, 2011

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Sounds like a bad relay. Unfortunately that relay is on a circuit board. You can bypass the board, I will help you if it's actually the case. But, to test it, turn power off to unit, on the circuit board you will have a relay(In the indoor unit) on this relay you have three wires, swap the two wires that are right next to each other. You will see 2 wires very close to one another and another off to the side. Swap the 2 that ARE RIGHT NEXT TO EACH OTHER. Turn power back on to unit. This should make the fan run non stop all the time. If it does let me know.

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