Choose Product
Identify Problem
03
Find Solutions
HomeRepair HelpHeil Central A/C RepairHeil Central air conditioner not cooling properly Repair

Heil Central air conditioner not cooling properly

Is your Heil central air conditioner not cooling properly? Check the main control board first when the condensing unit contactor is not receiving 24 volts or the furnace blower motor is not getting power. Next, inspect for an airflow problem: a clogged air filter, blocked registers, or dirty blower wheel can restrict air, cause the evaporator coil to freeze, and leave your central air not cooling or blowing warm air. A faulty contactor can prevent the condensing unit from receiving power, while a failed dual run capacitor can make the condenser fan motor noisy, overheated, or unable to run. If airflow is good, the evaporator and condenser coils are clean, and the fan, compressor, and blower operate but the air conditioner is still not cold, suspect a sealed-system leak or restriction. A relay board can also stop the blower motor from receiving power. Turn off power before inspecting accessible parts, and leave 240V testing or replacement to a qualified technician. Refrigerant and any sealed-system repair require an EPA 608-certified HVAC technician. Enter your model number to find the exact replacement part for your Heil central air conditioner.

01 - Heil Central Air Conditioner Main Control Board

If the central air condensing unit contactor is not receiving 24 volts or power is not getting to the furnace blower motor, a possible cause is a defective furnace main control board. While this is not a common problem, if all other potentially faulty components are working properly, the main control board should be replaced.
Enter model number to search for the required part specific to your product
Need help finding your model number?
Shop all Heil Central Air Conditioner Main Control Board Parts
Top Solution

02 - Air Flow Problem

Proper air flow is critical for the central air conditioner to work properly. The evaporator needs proper air flow to keep the condensing water from freezing. If the air filter or blower wheel gets clogged, ice can start forming on the evaporator coils, eventually freezing them up and preventing proper air flow. It is recommended to replace the air filter at least every 6 months or sooner depending on the conditions. Refer to owner's manual for guidance. Avoid covering registers with furniture, rugs, or other items that will restrict the air flow.
Top Solution

03 - Heil Central Air Conditioner Contactor

The furnace control board sends a low voltage signal to the contactor. When the contactor receives the signal from the control board, it closes the circuit, sending voltage to the condensing unit components. If the contactor is defective, it will not provide voltage to the condensing unit. To determine if the contactor is at fault, use a multimeter to test the contactor for continuity. If the contactor does not have continuity, replace it.
Shop all Heil Central Air Conditioner Contactor Parts
Highly Likely

04 - Heil Central Air Conditioner Dual Run Capacitor

If the dual run capacitor is defective, the fan motor might be noisy, overheat, or not run at all. To determine if the dual run capacitor has failed, inspect the capacitor. If the dual run capacitor is bulging or leaking, replace it.
Shop all Heil Central Air Conditioner Dual Run Capacitor Parts
Highly Likely

05 - Sealed System Problem

If the unit has good air flow, the evaporator and condensing unit coils are clean, the fan and compressor are running, and the furnace blower is on, but there is still not enough cooling, it is likely there is a leak or restriction in the sealed system. Since diagnosing and repairing a sealed system takes specialized tools and knowledge, a qualified service technician should diagnosis and repair the unit.
Highly Likely

06 - Heil Central Air Conditioner Relay Board

A relay board is often used to control components of an a central air condidtioner. If the blower motor is not receiving power, the relay board is likely the cause. A defective relay board will need to be replaced.
Shop all Heil Central Air Conditioner Relay Board Parts
Common

Frequently Asked Questions

Why is my Heil central air conditioner not cooling or blowing enough air?
Why is my Heil outdoor AC unit not running?
What causes a Heil condenser fan to make noise or stop spinning?
Could a sealed system problem be causing my Heil central AC to blow warm air?
How do I find the correct replacement part for my Heil central air conditioner?

Shop by Heil Central Air Conditioner Parts

Heil Central Air Conditioner Axle, Roller, Shaft, Wheel Replacement Parts
Heil Central Air Conditioner Bearing Replacement Parts
Heil Central Air Conditioner Belt Replacement Parts
Heil Central Air Conditioner Blade Replacement Parts
Heil Central Air Conditioner Blower Wheel & Fan Blade Replacement Parts
Heil Central Air Conditioner Bracket & Flange Replacement Parts
Heil Central Air Conditioner Cap, Lid & Cover Replacement Parts
Heil Central Air Conditioner Capacitor Replacement Parts
Heil Central Air Conditioner Circuit Board & Timer Replacement Parts
Heil Central Air Conditioner Compressor & Sealed System Replacement Parts
Heil Central Air Conditioner Curtain & Accordian Replacement Parts
Heil Central Air Conditioner Drip Bowl & Drip Pan Replacement Parts
Heil Central Air Conditioner Duct & Venting Replacement Parts
Heil Central Air Conditioner Fastener Replacement Parts
Heil Central Air Conditioner Filter Replacement Parts
Heil Central Air Conditioner Gas Burner & Control Valve Replacement Parts
Heil Central Air Conditioner Grille & Kickplate Replacement Parts
Heil Central Air Conditioner Heating Element Replacement Parts
Heil Central Air Conditioner Insulation Replacement Parts
Heil Central Air Conditioner Miscellaneous Replacement Parts
Heil Central Air Conditioner Motor Replacement Parts
Heil Central Air Conditioner Panel Replacement Parts
Heil Central Air Conditioner Pulley Replacement Parts
Heil Central Air Conditioner Switch Replacement Parts
Heil Central Air Conditioner Thermostat Replacement Parts
Heil Central Air Conditioner Transformer Replacement Parts
Heil Central Air Conditioner Valve & Float Replacement Parts
Heil Central Air Conditioner Wire, Receptacle & Wire Connector Replacement Parts
Repair Clinic
Join Repair Clinic's VIP email list for 10% off, plus other discounts and tips!
Our Story

Family-owned and operated since 1912, Burke America Parts Group is the longest-running genuine appliance, HVAC, and outdoor power equipment parts solution in North America. At Repair Clinic, we're proud to be an international brand trusted by the pros as well as the DIY community.

About Repair Clinic
Customer StoriesRepair Parts BrandsDIY Repair BlogIn the News
Click for the BBB Business Review of this Appliances - Major - Parts & Supplies in Canton MI
Quick Links
Shipping Information365 Day Return PolicyRetail Location & HoursContact UsTrack OrderReviewsRepair Clinic Pro
Social Media
Privacy PolicyDo Not Sell/Share My Personal InformationTerms & ConditionsSitemapGet 10% Off
© 2026 RepairClinic.com