More blog posts about heating and air conditioning:

  1. The coils on my heat pump are covered with ice on cold mornings. What’s wrong with it?

  2. What is the SEER of my old air conditioner?

  3. What is the difference between the “ON” and “AUTO” settings on my thermostat?

  4. How do I find the right size air conditioner for my house?

  5. What is an HVAC system?

  6. What does an ultraviolet air treatment system do?

  7. What is a “ton” of air conditioning?

  8. The coolant line to the outside unit of my air conditioner is frozen. What's wrong?

  9. What size air conditioner is right for my mobile home?

  10. What is the minimum SEER rating for a new air conditioner?

  11. What does the “AFUE” rating of a furnace mean?

  12. Why are some rooms colder or warmer than others?

  13. How much life is left in that air conditioner?

  14. What does the MERV rating number on an air conditioner filter mean?

  15. Why is there mold around the air conditioning ducts?

  16. What is wrong with an air conditioner when the air flow out of the vents is low?

  17. How much will it cost to replace my old air conditioning system?

  18. What is the difference between the SEER and EER rating of an air conditioner?

  19. What is the difference between a heat pump and a cooling air conditioner?

  20. What is the right MERV number for my air conditioning filter?

  21. Should I move the air conditioner into the attic?

  22. My air conditioner outside unit (condenser) won’t start and is making a humming noise. What’s wrong?

  23. What is an air conditioning heat recovery system?

  24. What is the best air conditioner for a mobile home?

  25. What is the average lifespan of an air conditioner?

  26. Why does the air conditioner condensate drain line need a trap in it?

  27. Should I remove an old whole house fan or keep it?

  28. What is a jump duct?

  29. My air conditioner won’t turn on What’s wrong?

  30. Is it acceptable for an air conditioning condensate drain line to terminate under the house?

  31. What is the purpose of the vent grille over the bedroom door?

  32. Should I have a return air vent in the master bedroom?

  33. Will closing doors reduce my heating and cooling costs?

  34. How much will I save on my utility bill if I get a new higher SEER air conditioner?

  35. Why is there a wall switch next to the furnace or indoor unit of the air conditioner in the garage?

  36. Which one is better for a home heating system: electric or natural gas?

  37. Why is it bad to have a clothes dryer vent near an air conditioning condenser (outdoor unit)?

  38. How can I tell if an air conditioner uses R-22 or R-410A refrigerant?

  39. Why is my air conditioner not cooling enough?

  40. What is a return air plenum for a furnace or air conditioning system?

  41. When is an auxiliary drain pan required under an air conditioner indoor unit (air handler)?

  42. Why does it take so long to cool a house when the air conditioner has been off for a while?

  43. What are the right words to use when talking about a heating and air conditioning system?

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We want you to be an informed homebuyer, and each blog post is a question that we have answered for our friends and customers over the years. Hope they help you make a good choice for your next home.

   If you want to manually choose the electric resistance heat strip on an older thermostat, you slide a switch to EM HEAT or EMER HEAT. You tap the selection on the screen of a newer thermostat. The end result is the same as auxiliary heat except that it is manually chosen by you, and the electric heat strip becomes the only heat source, because the heat pump is turned off in emergency heat mode.


While we hope you find this series of articles about home inspection helpful, they should not be considered an alternative to an actual home inspection by a local inspector. Also, construction standards vary in different parts of the country and it is possible that important issues related to your area may not be covered here.
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