Heat Pump Defrost Problems Bowling Green KY

Posted by on Feb 17, 2013 in Gra-Tac Heating & Cooling | Comments Off on Heat Pump Defrost Problems Bowling Green KY

Heat Pump Defrost Problems not only hurt your wallet, they mess with your home comfort.

 

Bryant Heat Pump Bowling Green KY Defrost Problem

 

 

 

 

 

 

 

 

 

When a heat pump looks like this, the heat transfer goes away and it definitely needs to defrost or it will cost you on your electric bill and your comfort level.  The first thing to do is look at the unit in the next 30 minutes to an hour, if the ice or frost is gone – everything should be normal.  Heat Pumps regularly freeze and thaw during normal operation, so seeing ice or frost on a heat pump is part of the normal process.  If the ice doesn't go away, is constantly formed in irregular frost patterns, or just keeps getting thicker (we have seen heat pumps covered in ice, several inches thick), it's time to call an experienced HVAC Technician.

There are many causes for ice or frost on a heat pump.  Some times it is just normal, the coil is below 32 degrees and the humidity level is high enough that you couldn't stop ice from forming – but that is what the defrost controls are for.  Other causes that should be immediately looked at by an HVAC Technician are:

 

  • Low Refrigerant can cause irregular looking frost patterns, with the cost of refrigerant today, all leaks should be found
  • Bad Defrost Boards or Sensors can cause units to freeze into blocks of ice
  • Stuck Reversing Valves can also cause units to freeze into blocks of ice or worse be stuck in air conditioning
  • Freezing Rain can cover the top of the unit, not allowing air to move over the coil, which will result in more ice
  • Condenser Fan Motors that stop in the winter will cause defrosting problems
  • Some times it's bad not to see some frost, the Defrost Board may be set to defrost too often – which is almost as bad

 

There are corrective actions for each of these scenarios, that an experienced HVAC Technician can take care of.  But some times it is better to just replace the system with a new one, like in this case.

 

Trane XB13 Heat Pump

 

 

 

 

 

 

 

 

 

This Trane XB13 Heat Pump is almost 30% more efficient than the Bryant Heat Pump (when it was new) that it is replacing.  The Trane Heat Pump also has DEMAND DEFROST, where the older Bryant Heat Pump had a Timed Defrost.  Demand Defrost is always better than Timed Defrost.  Timed Defrost sees it is under 32 degrees outside and counts the run time from 30, 60, 90, and some times as high as 120 minutes of run time and then goes into defrost, clearing the coil.  Every time a Heat Pump goes into Defrost, it switches to air conditioning mode, cooling the house down (not that much, because it brings on the electric heat or back up heat to keep the home warm – READ EXPENSIVE $$$) to clear the coil and start the cycle again.

 

For more questions about heat pump defrost or replacing your current heat pump with a new more efficient heat pump by Trane, call your local Trane Comfort Specialist Dealer.

 

Bowling Green's Trane Comfort Specialist Dealer:

 

Gra-Tac Heating & Cooling
563 Lovers Lane
Bowling Green, KY  42103
270-843-1514

www.Gra-Tac.com

 

KY HVAC HM02855

 

 

 

Posted from Bowling Green, Kentucky, United States.

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