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I'm guessing this is in a car, truck, or van since it is in that category.
- Diverter door malfunction: Most if not all cars use a diverter door to push air past either the Heater Core, or Evap (air conditioning); these doors are controlled by a vacuum pot (hose and line) in most cars, and by electric means (In rare instances). You will need to find specifics about 'your car' to tell what type, as well as its location to see if 'that' is the problem.
- Some cars use a valve on the heater line (the line that allows hot water to enter the heater core) if this valve is damaged, or stops working, then hot water will not reach the core to provide heat.
- There is always the case that someone has bypassed the heater core (disconnected it) as well.
That should give you enough information to start at least.
What else can I help you with?
Should cold air returns be near the ceiling or on the floor?
Floors in heating season, ceilings in Air Conditioning season
Does central heating work better than an air condition unit?
Depending on what situation it is. If it is a small house central heating works better, if it is a big house then air conditioning works better.
What causes Condensing unit to blow cold air outside and warm air inside vents?
Compressor not operating.
Heating Air Systems?
form_title= Heating Air Systems form_header= Stay warm with a heating air system. How old is your heating air system?*= _ [50] Please describe the problem in detail.*= _ [50] Are air ducts present in every room?*= () Yes () No
Where is air vented from a hydronic heating system?
what is air vented from a hydronic heating system
2nd floor blows cold air no heat?
Check upstairs heating unit.
Will a bad thermostat causes a heating unit to blow out cold air?
If the unit started it`s probably not the stat.
Can you repo a central heating and air unit?
No you can't repo a central heating and air unit. Because you are a licensed heating contractor you can put a lien on their home. You can sue them for the money, but the unit is now their property.
AC unit blows cold air when in heat position is there a special Heating device that needs to be added to the unit?
sounds like the unit may be going on defrost. if it only dose it once and a while for a period of time this could be the case. if so your backup electric should be coming on to offset the cold air.
Have a vulcan ultra 30 under floor ducted heating unit and it blows cold air and the igniter unit fires and fan blows but the burners will not light ignite but it keeps blowing cold air any sugg?
check your thermocoupler. It will not let the gas flow if it is faulty. Easy fix too.
What is the problem w 1999 ford expedition Eddie Bauer's heating unit a-c puts out hot air in summer and cold air during winter?
Needs to be charged. 134a You might have a leak.
What is the purpose of a basement cold air return in a heating and cooling system?
The purpose of a basement cold air return in a heating and cooling system is to circulate and return cold air from the basement back to the furnace or air conditioner for re-heating or re-cooling. This helps maintain a balanced temperature throughout the home and improves the overall efficiency of the system.
What is the function of an air handling unit?
The operating principle of air handling unit is by circulating and then conditioning air flow. This is achieved by cooling, heating and ventilating the units.
Central air not blowing cold air?
There are a few reasons why a central air unit is not blowing cold air. The coils may be dirty, the unit may need freon, or the thermostat could be broken.
Does cold air come in or out when using an air conditioner?
When using an air conditioner, cold air comes out of the unit and into the room to cool it down.
What changes cold air to hot air?
Cold air can be changed to hot air through the process of heating. This can be achieved by passing the cold air through a heater, which raises its temperature to make it hot. The process of heating involves adding energy to the air, causing its molecules to move faster and increase in temperature.
Can an outside heating and air unit cause carbon monoxide poisoning?
Yes
