Head freezing up
A frozen head means restricted airflow or low refrigerant. Filters come first, then the charge is read and a leak is looked for.
Frozen heads, leaking lines and units that won't hold a setpoint
Ductless mini split repair Denver: no-cool and freeze-ups
Ductless mini split repair starts with a findable cause: a mini-split that will not cool, freezes up in winter, or drips water down the wall usually has a clogged filter, a refrigerant leak, a failed sensor or a blocked drain.
Call any time
Call (720) 806-7634
The phone is answered any hour, day or night. Ring (720) 806-7634, name the head that is acting up and what it is doing, and the visit gets talked through.
Call Now (720) 806-7634 →Phone-only booking — name the head and the fault.
Found at the head, fixed at the cause.
About this service
Ductless mini-split repair in Denver: what the visit covers
Repair is diagnosis plus the mechanical work that restores heating and cooling to a wall-mounted system: indoor head, outdoor unit, refrigerant lines, drain, controls. The visit starts with symptoms — which head, what it is doing, when it started.
Denver winters are the hard season for a mini-split. A head freezing up is usually low on refrigerant or short on airflow, and dry, dusty air clogs filters faster than in most climates. Homes across Denver that rely on mini-splits for rooms the ducts never reached feel a failed head at once.
- ✓Head, outdoor unit and lines checked together
- ✓Refrigerant charge and leaks traced
- ✓Filters, drain and controls checked
- ✓Head tested in heating and cooling after the fix
What's included
What a ductless mini-split repair visit includes
Find the fault across the whole system, explain it, fix what failed, test the head through heating and cooling. Every visit follows that shape.
✓
Full diagnostic, head and outdoor unit
Indoor head, outdoor unit and line set are checked together. A fault at the head often starts outside, and a fault outside often shows at the head.
✓
Refrigerant charge and leak check
Pressures are read and lines, flares and coils checked for leaks. Low charge always has a cause, and topping up without finding the leak only delays the next call.
✓
Filter and airflow check
The head's filters are checked and cleaned, and airflow through the head is measured. A clogged filter freezes heads in winter and starves them in summer.
✓
Drain checked
Condensate drain checked for blockages, so water leaves the house instead of dripping down the wall behind the head.
✓
Controls and sensors tested
Remote, wall control, and the head's temperature and coil sensors are tested. A sensor reading wrong makes a healthy system behave like a broken one.
✓
Heating and cooling test
Once fixed, the head is run through heating and cooling, with temperatures taken at the head and across the room.
How it works
How a ductless mini-split repair visit works
01
Call and describe the head
Ring (720) 806-7634 and name the head that is acting up, what it is doing, and when it started. Symptoms point to where the fault lives.
02
Diagnostic at the head and outside
The head's filters, coil and drain are checked, then pressures are read at the outdoor unit and controls and sensors tested.
03
Plain-English explanation
Nothing is touched until you have heard what failed, why it failed, and what the repair involves. A frozen head comes with the reason it froze, not merely the fact that it did.
04
Repair and testing
Once agreed, the failed part is replaced or the leak is found and repaired, and the head runs through heating and cooling.
05
Walkthrough before we leave
What failed is shown to you, filters are cleaned together, and controls are set together. Later questions go to the same number.
Tools & methods
Tools and methods we bring to a mini-split call
Mini-split diagnosis is reading work at small scale. These instruments separate a guess from a fault.
Manifold gauge set
At the outdoor unit, refrigerant pressures are read so charge can be set against the maker's numbers instead of guessed.
Multimeter
It tests the head's sensors, the control board and the outdoor fan motor. A sensor reading wrong is found on a meter, not by swapping parts.
Leak detector
It finds refrigerant leaks at flares, joints and coils. Low charge always has a cause, and the detector is how it is found.
Torque wrench
After a repair, flare connections are tightened to the maker's specification. Too tight and they crack and leak; too loose and they weep.
Thermometers and temperature probes
They measure temperature at the head and across the room, so heating and cooling are proved rather than assumed.
Vacuum pump
It evacuates the lines of air and moisture after a leak repair, before the system is charged again.
Common situations
Mini-split trouble we see across Denver
Head freezing up in winter
Situation
A mini-split head in a Denver addition ices over on cold mornings and stops heating the room.
What we check
Filters and airflow are checked first, then the charge is read and a leak is looked for. A frozen head is usually an airflow or refrigerant problem.
Head running, room not cooling
Situation
A head in a Denver bedroom runs all afternoon while the room stays warm, and air from the head feels only slightly cool.
What we check
Pressures are read at the outdoor unit, head coil and filter checked. Low charge or a clogged filter are the usual causes.
Water dripping down the wall
Situation
A head in a Denver living room drips water down the wall behind it, and the wall is starting to stain.
What we check
Condensate drain checked for a blockage and the head's level checked. A blocked drain or a head settled out of level are the usual causes.
Problems we solve
Ductless mini-split problems we fix in Denver
Mini-split calls mostly follow a few familiar patterns. These are the ones seen most across Denver, and the way each is approached.
Ask a pro →↗
Head not cooling or not heating
Pressures are read at the outdoor unit and the head's sensors and controls tested. A sensor reading wrong makes a healthy system behave like a broken one.
Water dripping from the head
Water from a head usually means a blocked condensate drain or a head out of level. Drain and mounting are checked before anything else.
Head making a new noise
Clicking, buzzing or rattling from a head usually means a fan, a louvre motor or a loose mounting. The head is opened and the source found rather than guessed at.
Proof you can check
Ductless mini-split repair proof you can check
A mini-split head serves the room it hangs in, so when it fails that room feels it at once — and in a Denver winter a frozen head is usually a filter or a charge problem, found at the head itself.
Customer reviews
What Denver customers say
Lion Tech Home Services' Google rating is 5.0 stars, from 11 reviews — all five stars.
“Martin was very prompt in responding to our requests and completing the work on a timely basis. His expertise is HVAC but he is very capable in all home maintenance areas. We have complete confidence in Martin's abilities and work and will call on him for any future projects we might have.”
JERRY SUNDBY — Google review
A head freezes up when airflow is restricted — usually a clogged filter — or when the refrigerant charge runs low. Filters come first, then the charge is read and a leak is looked for.
Switch the head off and put a towel down. The usual cause is a blocked condensate drain. Do not keep running it — ring (720) 806-7634 and Lion Tech Home Services will find the blockage.
It turns on what failed. A filter clean and a leak repair are very different jobs, so the diagnostic comes first and you hear what is wrong and what the repair involves before any work begins.
Lion Tech Home Services fixes ductless mini-splits across Denver, from Highland and Berkeley to Park Hill and Central Park. Ring (720) 806-7634 — the phone is answered around the clock.
Ready when you are
Mini-split acting up? Call and talk through your system
Ring (720) 806-7634 and name the head that is acting up and what it is doing. The visit gets talked through on the call.
Call (720) 806-7634 →
Request an appointment
Contact Lion Tech Home Services
Lion Tech Home Services, Denver — call (720) 806-7634, open 24 hours.