Ice forming in your deep freezer is great, it means that your freezer is working, and your investment paid off. However, if you notice ice forming on your HAVC unit, then your system has gone haywire. Mostly, the ice starts forming on the evaporator coil, and then crawl all the way to the outdoor unit. Once, you notice the ice formation, shut it off with just the blower running and that might defrost the accumulation naturally. When the system defrosts, investigate for the following reasons why ice can form on your HVAC system. You can rectify a few faults by yourself, for others you would need to call Crump A/C and Heating to pull your A/C out of slump.

Dirty, Blocked, or Clogged Air Filters:

When was the last time you changed the air filter? If you cannot recall, then now is a good time to service your air filter. Moreover, due to renovations, like painting or woodwork, fine particles can easily clog the filters. In addition, make sure that no exit vent is blocked by a piece of furniture. An obstructed exit vent has effects similar to those caused by dirty filters.

Low On Refrigerant:

Low gas pressure can also cause a drop in air pressure. Therefore, a jammed air filter causes a critical dip in air pressure. Along with clogged filters, low refrigerant can also cause a pressure drop. If that is the case, refilling the unit will pull it out of its icy misery. Ideally, there should not be a drop in gas pressure unless your unit has a leakage. The prime location of the leakage are copper pipes that carry refrigerant.

Moreover, refilling is not a DIY (do it yourself) project because it is vital to not only replenish the gas but also repair the leakage. Therefore, call us at 281-533-9200 to top up the refrigerant pressure and repair any leaks.

Burnt Out Blower Motor:

If the blower fan fails to start because of a malfunctioning motor, the blower fan will be hot to touch. Motors often give up the ghost because of capacitor failure, winding problems, or slipped out ball bearings. An extremely dirty motor also performs below par causing ice to form.

Dirty Evaporator Coil:

When filth and dirt clog an evaporator coil, the air cannot cross the coil thus a drop in pressure. Similarly, when the air pressure drops, ice starts to form.


Once you notice ice in your HVAC unit, shut down the unit and allow the ice to thaw. Continuously running the unit will only trigger the accumulation of ice. Ice usually forms on the evaporator coil and then runs along the refrigerant line to the condenser. Try to look for the reasons for ice formation on the HVAC unit as discussed. You can always start by scrubbing the air filters. If filter cleaning yields no result, examine the unit for low refrigerant signs. You can always rely on Crump A/C and Heating, we will take care of the unit’s cold attitude.

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