#Aquaterm heat pump troubleshooting how to#
#Aquaterm heat pump troubleshooting manual#
#Aquaterm heat pump troubleshooting series#

A cooling coil which is blocked by debris or ice and frost can obstruct air flow and reduce air conditioning system output See COOLING COIL or EVAPORATOR COIL for a description of diagnosis and repair of cooling coil problems since this component is normally located within the air handler chassis as well. See FROST BUILD-UP on AIR CONDITIONER COILS

Are the coils dirty or iced or blocked? Are the evaporator coils (cooling coils or heating coils) clean?.

See DIRTY A/C BLOWERS below in this article.

Is the air handler or its condensate drip tray dirty? Are there moisture, debris, visible mold, or other contaminants (rodents, birds) in or around the air handler or blower assembly?.

Or ZONE DAMPER CONTROLS to open or close airflow through individual duct system sections.Ĭommercial and large building duct systems may include fire dampers that could be closed.

#Aquaterm heat pump troubleshooting manual#

Are the duct dampers working? Some HVAC systems use manual or automatic duct dampers.

Are the air filters installed, proper size, clean?.

Is the blower fan cutting on or off when you think it shouldn't ?ĬASE 1: the furnace BURNER cycles ON-OFF during a call for heat, BLOWER remains ON - high limit rockingĬASE 2: the furnace BLOWER FAN cycles ON-OFF while BURNER remains ON - blower short-cyclingĬASE 3: the furnace BLOWER FAN cycles ON-OFF AFTER a call for heat, BURNER remains OFF - residual heat purge problem.

Is the blower assembly fan operating? You should hear the fan motor running and the fan assembly should be spinning.

Initial, simple diagnostic checks of the air handler system are also describedĪt Ducts & Air Handler diagnosis: Basic checks of the indoor air handler (blower), air ducts, and filter systems. See DUCT SYSTEM DESIGN SIZE & DEFECTS - also check for a clogged or dirty filter or blocked air return.

Is air flowing from the air supply registers?.

See COOLING CAPACITY, RATED of air conditioning equipment if the system seems to be working but is inadequate to cool your building. If all of the controls are calling for system operation but the blower motor won't run,

If your air conditioning or heat pump system has lost its cooling capacity or won't start.

Is the system turned on? Check thermostat to see that it is calling for heat or cooling, service switches at the equipment, check fuses or circuit breakers serving the equipment for cooling systems check for a condensate drip tray overflow switch that may have turned off the system.

Here we provide air handler unit or blower assembly troubleshooting by expanded annotated information from the US EPA who provided suggestions for investigating the air handling unit during an indoor air quality investigation.

FROST BUILD-UP on AIR CONDITIONER COILS - blocks air flowīasic air handler unit or blower unit troubleshooting checks.DIRTY COOLING COIL / EVAPORATOR COIL - blocks air flow.

#Aquaterm heat pump troubleshooting series#

BLOWER FAN OPERATION & TESTING - a series of diagnostic steps.

MOLDY Growth in Air Conditioning Blower Fans.LEAKY Air Conditioning air handler unit (AHU).Air Handling Unit Troubleshooting - Quick Checks to fix no air flow or weak air flow We also provide an ARTICLE INDEX for this topic, or you can try the page top or bottom SEARCH BOX as a quick way to find information you need.

#Aquaterm heat pump troubleshooting how to#

How to Keep the HVAC Blower Assembly Clean.Īir Conditioning Blower Fan, Cooling Coil, Fan Coil Unit Leaks, Mold, and Filter Problems &: Repairs. Causes & Photographs of Mold Growth in Air Conditioning Blower Fans. Air Conditioning air handler unit (AHU) leaks. Dirty, contaminated air conditioner blower fans, reduced air output, fan cleaning advice. Quick troubleshooting guide for air handling units or blower assemblies in air conditioners, heat pumps, some furnaces. Indoor components of air conditioners and heat pumps: the air conditioning system indoor air handler units, blower units, or AHU's, (also called fan coil units) including the air conditioner blower fan, the indoor cooling coil or 'evaporator coil', airĬonditioning system filters, and the causes, cures, and prevention of air handler leaks that lead to rust, damage, and mold contamination in the Troubleshoot the indoor air handler or blower unit for A/C or heat pump or furnace system. We have no relationship with advertisers, products, or services discussed at this website. InspectAPedia tolerates no conflicts of interest.