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Coupons & Special Offers

Air Conditioning, Heating, Plumbing, and Electric Savings Coupons

Save Big with Online Deals

At Cornerstone, your budget is a priority—so we provide competitive pricing that delivers on value. To save even more, choose one of the offers below and present it to your Cornerstone technician. Thank you for entrusting your comfort to us!

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FREEWater Heater Flush

FREE Water Heater Flush

With any service repair over $400
Offer expires 9/30/21. Coupon must be presented at time of estimate. Cannot be combined with any other offers. One coupon per household. Other restrictions may apply.
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$29.95Service Call or Tune-Up

$29.95 Service Call or Tune-Up

Monday - Friday only.
Offer expires 9/30/21. Coupon must be presented at time of estimate. Cannot be combined with any other offers. One coupon per household. Other restrictions may apply.
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FREEEstimate

FREE IAQ System Estimate

Offer expires 9/30/21. Coupon must be presented at time of estimate. Cannot be combined with any other offers. One coupon per household. Other restrictions may apply.
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$50 OffPlumbing or Electrical Service Repair

$50 Off Plumbing or Electrical Service Repair

Cannot be applied to diagnostic fee or service fee
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Free Camera Plumbing Inspection

Free Camera Plumbing Inspection ($250 Value)

Must be an accessible clean out.
Offer expires 9/30/21. Coupon must be presented at time of estimate. Cannot be combined with any other offers. One coupon per household. Other restrictions may apply.
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$69 Electrical Service Fee

$69 Electrical Service Fee (Regular Price $99)

Offer expires 9/30/21. Coupon must be presented at time of estimate. Cannot be combined with any other offers. One coupon per household. Other restrictions may apply.
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Energy-EfficientCombo Deal

Energy-Efficient Combo Deal

Get $200 off when you upgrade to a more efficient AC unit and tankless water heater at the same time.
Offer expires 9/30/21. Coupon must be presented at time of estimate. Cannot be combined with any other offers. One coupon per household. Other restrictions may apply.
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FREEEstimate

FREE Generator Estimate

+ $150 off installation!
Coupon must be presented at time of estimate. Cannot be combined with any other offers. One coupon per household. Other restrictions may apply.
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FREEEstimate

FREE Air Conditioning or Heating Estimate

+ $150 off installation!
Coupon must be presented at time of estimate. Cannot be combined with any other offers. One coupon per household. Other restrictions may apply.
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$49Emergency Call

$49 Emergency Service Call

Air, Plumbing, or Electrical. Mon-Fri 8am-8pm
Coupon must be presented at time of estimate. Cannot be combined with any other offers. One coupon per household. Other restrictions may apply.
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$49.95Plumbing Tune-Up

Plumbing Tune-Up and Water Heater Inspection & Flush

Just $49.95 for a plumbing tune-up with water heater inspection and flush!    
Coupon must be presented at time of estimate. Cannot be combined with any other offers. One coupon per household. Other restrictions may apply. Excludes tankless water heaters.
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$29.95Plumbing Peace of Mind

Plumbing Inspection

Only $29.95 to inspect your plumbing system. Have peace of mind that your water lines, pipes and drains are reliable.
Coupon must be presented at time of estimate. Cannot be combined with any other offers. One coupon per household. Other restrictions may apply.
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$50Electrical Safety Check

Electrical Home Inspection

Only $50 to inspect your home electrical system. Ensure your family is safe.
Coupon must be presented at time of estimate. Cannot be combined with any other offers. One coupon per household. Other restrictions may apply.
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$50 OFFNew Water Heater

$50 Off Water Heater Replacement

Coupon must be presented at time of estimate. Cannot be combined with any other offers. One coupon per household. Other restrictions may apply.
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$25 OFFAny Repair

$25 Off Any Repair

AC, Heating, Plumbing or Electrical
Must present coupon. Cannot be combined with other coupons--one per visit.
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NEW ACDiscount or Financing

$150 Off OR 12-Month Special Financing

On New 15 SEER or Higher AC System, with approved credit
Coupon must be presented at time of estimate. Cannot be combined with any other offers. One coupon per household. Other restrictions may apply.
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FREENest Thermostat

Free Nest Thermostat With Any AC Replacement

16 SEER single-stage system only
Coupon must be presented at time of estimate. Cannot be combined with any other offers. One coupon per household. Other restrictions may apply.
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$50 OFFNew LED Lights

$50 Off LED Lighting Upgrade

Coupon must be presented at time of estimate. Cannot be combined with any other offers. One coupon per household. Other restrictions may apply.
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$50 OffIAQ Solutions

$50 Off Indoor Air Quality Products

Coupon must be presented at time of estimate. Cannot be combined with any other offers. One coupon per household. Other restrictions may apply.
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$100 OffTankless, Hybrid Water Heaters

$100 Off New Tankless or Hybrid Water Heater Installed

Coupon must be presented at time of estimate. Cannot be combined with any other offers. One coupon per household. Other restrictions may apply.
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FREESecond Opinion

Free Estimates & Second Opinion

New AC system, Air quality inspection, Ductwork replacement, Water heater replacement, Plumbing whole-home repipe, Water treatment & purification, Electrical panel upgrade, Whole-home generator
Coupon must be presented at time of estimate. Cannot be combined with any other offers. One coupon per household. Other restrictions may apply.
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SAVEOn Whole-Home Generator

$75 Off and 12-Month Special Financing on a Whole-Home Standby Generator

Get a free estimate today!

With approved credit
Coupon must be presented at time of estimate. Cannot be combined with any other offers. One coupon per household. Other restrictions may apply.
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FREEWater Testing

FREE Water Quality Test & Estimate for Water Treatment

Coupon must be presented at time of estimate. Cannot be combined with any other offers. One coupon per household. Other restrictions may apply.
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SAVEOn Water Treatment

$75 Off and 12-Month Special Financing on New Water Treatment System

Get a free estimate today! With approved credit
Coupon must be presented at time of estimate. Cannot be combined with any other offers. One coupon per household. Other restrictions may apply.
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REBATEOn Daikin Systems

Cash Rebate up to $1200 Instantly

Daikin Brand Energy Intelligent Indoor Comfort Equipment: 12-year warranty and 100% satisfaction guarantee
Applies to qualifying Daikin equipment. Coupon must be presented at time of estimate. Cannot be combined with any other offers. One coupon per household. Other restrictions may apply.
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