Collins Heating and Cooling AC repair service in Highland Indiana
AC Repair

AC Repair in Highland, Indiana

★★★★★ 4.8 stars · 112 Google reviews
Honest diagnosis Upfront pricing A real person answers In business since 2005
Call (219) 924-7423
Warning Signs

Signs Your AC Needs Repair

Northwest Indiana summers heat up fast. If your AC is showing any of these signs, getting it looked at now is a lot cheaper than a repair call in the middle of July when everyone's calling.

Not Cooling Enough
Running constantly but the house won't get cool. Could be low refrigerant, a dirty coil, or a failing compressor.
Blowing Warm Air
Air coming out of the vents feels warm or room temperature. Usually a refrigerant or compressor issue.
Short Cycling
AC turns on and off every few minutes without completing a full cooling cycle. Hard on the compressor and your energy bill.
Unusual Noises
Grinding, banging, squealing, or rattling from the unit. Loose parts or a failing motor — shouldn't be ignored.
Water or Ice Around the Unit
Ice on the coils or water pooling near the unit usually means restricted airflow or a refrigerant problem.
Electricity Bills Spiking
A sudden jump in your electric bill during cooling season means the AC is working harder than it should to keep up.
Running constantly but the house won't get cool. Could be low refrigerant, a dirty coil, or a failing compressor.
Air coming out of the vents feels warm or room temperature. Usually a refrigerant or compressor issue.
AC turns on and off every few minutes without completing a full cooling cycle. Hard on the compressor and your energy bill.
Grinding, banging, squealing, or rattling from the unit. Loose parts or a failing motor — shouldn't be ignored.
Ice on the coils or water pooling near the unit usually means restricted airflow or a refrigerant problem.
A sudden jump in your electric bill during cooling season means the AC is working harder than it should to keep up.
The Process

What to Expect When You Call Collins

Straight answers, no upsell pressure, no surprises on the bill.

1
A Real Person Answers
No hold music or phone trees. You get a straight answer about scheduling right away.
2
Full System Diagnosis On-Site
We check the whole system — not just the obvious symptom. You get a clear picture of what's wrong and why.
3
Upfront Price Before We Start
You'll know exactly what it costs before any work begins. No surprises on the invoice.
4
Clean Repair, Clean Exit
Shoe covers on the way in, cleanup on the way out.
On service call fees: We charge a diagnostic fee to come out. If you approve the repair, that fee applies toward your total — you don't pay it twice.
AC repair service in Highland Indiana
Common Issues

Common AC Problems We Fix

Most air conditioner failures in NW Indiana come down to a handful of issues. Here's what we see most often during cooling season:

Low or Leaking Refrigerant
Refrigerant doesn't get "used up" — if it's low, there's a leak. We find it, fix it, and recharge the system properly.
Dirty or Frozen Evaporator Coil
A frozen coil is often caused by restricted airflow or low refrigerant. The fix depends on the root cause — not just thawing it out.
Failing Capacitor or Contactor
Capacitors and contactors are high-wear parts that fail in the heat. One of the most common AC repairs we make in summer.
Condenser Coil Problems
The outdoor coil can get clogged with dirt, grass, and debris. Reduced airflow across the condenser means reduced cooling capacity.
Blower Motor or Fan Issues
A failing blower motor means poor airflow through your ducts. The AC runs but the air doesn't move — so rooms stay warm.
Thermostat or Electrical Issues
Sometimes the AC itself is fine but the thermostat or wiring is wrong. A full diagnosis rules this out before any parts get replaced.
Refrigerant doesn't get "used up" — if it's low, there's a leak. We find it, fix it, and recharge the system properly.
A frozen coil is often caused by restricted airflow or low refrigerant. The fix depends on the root cause — not just thawing it out.
Capacitors and contactors are high-wear parts that fail in the heat. One of the most common AC repairs we make in summer.
The outdoor coil can get clogged with dirt, grass, and debris. Reduced airflow means reduced cooling capacity.
A failing blower motor means poor airflow. The AC runs but the air doesn't move — so rooms stay warm.
Sometimes the AC itself is fine but the thermostat or wiring is wrong. A full diagnosis rules this out before any parts get replaced.
Sound familiar?
We can usually diagnose the problem same visit.
Call (219) 924-7423
Maintenance

AC Tune-Up & Maintenance

The best way to avoid an AC repair call in the middle of July is a spring tune-up. A properly maintained AC runs more efficiently, lasts longer, and is far less likely to fail when you need it most.

What's Included in a Collins AC Tune-Up
  • ✓ Inspect and clean evaporator and condenser coils
  • ✓ Check refrigerant levels and inspect for leaks
  • ✓ Test capacitors, contactors, and electrical connections
  • ✓ Lubricate moving parts and inspect fan blades
  • ✓ Check thermostat calibration and operation
  • ✓ Measure airflow and system pressures
  • ✓ Inspect drain line and condensate pan

Spring is the right time — before the heat hits and before the schedule fills up. Call to set up your tune-up appointment.

Why Collins

Why Neighbors Trust Collins

Collins Heating & Cooling has been keeping homes comfortable in Highland and surrounding communities since 2005. When your AC goes out in the middle of a Lake County summer, you want someone who'll tell you the truth — not upsell you on a replacement you don't need.

📅
20+ Years in Business
Serving Highland and NW Indiana homeowners since 2005.
💳
Upfront Pricing
You approve the cost before any work starts. No hidden fees.
📞
A Real Person Answers
Call and reach someone who can actually schedule your service.
⭐
4.8 Stars · 112 Reviews
Consistent 5-star service across Google, Yelp, and the BBB.
Ready to get it fixed?
Call or request a quote — whichever works for you.
Reviews

What Customers Say

Real reviews from Highland and NW Indiana homeowners.

★★★★★

"This SAME DAY service I received from Mark was literally THE best service I ever received in my lifetime from any service provider, PERIOD! This man is honest, knowledgeable, kind and extremely reasonable. Please don't waste time searching anywhere else."

Farooq N.
Highland, IN
📄 Google Review
★★★★★

"We called Collins and Mark was able to come out the same day. He was very professional and took care of our AC problem the same day. He even agreed to come back and check our unit before Fall arrives. Thank you, Mark!"

Miguel S.
Highland, IN
📄 Google Review
★★★★★

"Mark was fantastic! He responded right away and did a very thorough exam of both our AC unit and furnace and explained things very clearly. He never tried to upsell us or give us more than we need. Highly recommend!!"

Joan D.
Munster, IN
📄 Google Review
FAQ

AC Repair Questions

It depends on the problem. We charge a diagnostic fee for the visit, and if you approve the repair, that fee applies toward your total. You'll always know the price before work begins.
Generally, if an AC is 12-15 years old and needs a major repair (like a compressor or refrigerant leak), replacement often makes more sense. We'll give you an honest recommendation based on what we find.
Spring is the best time — before temperatures climb and before the schedule fills up. Annual maintenance keeps your system running efficiently and catches small problems before they become big ones.
We serve Highland, Munster, Griffith, Schererville, Dyer, St. John, and Hammond in Northwest Indiana.
We work on all major AC brands including Carrier, Lennox, Trane, Goodman, Rheem, Bryant, York, and more. If it cools your home, we can diagnose and repair it.
New Installation

Thinking About a New AC?

Sometimes a repair is the right call. Sometimes the cost of fixing an aging unit makes more sense to put toward a new, efficient system. We'll give you an honest assessment — and if a new AC is the right move, we offer free estimates on all AC installations.

Free Estimates on New AC Installs
No pressure. Just an honest look at what makes sense for your home and budget.
Call for a Free Estimate
Get Started

Schedule Your AC Repair

Serving Highland, Munster, Griffith, Schererville, Dyer, St. John, and Hammond.

Call Us Directly
(219) 924-7423

A real person answers. Spring fills up fast — call early to get on the schedule before the heat hits.

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