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BBB Accredited Business since

M&M Heating & Air Conditioning Service Co.

Phone: (209) 952-6580 View Additional Phone Numbers 729 S Commerce St, Stockton, CA 95203 View Additional Web Addresses

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BBB Accreditation

A BBB Accredited Business since

BBB has determined that M&M Heating & Air Conditioning Service Co. meets BBB accreditation standards, which include a commitment to make a good faith effort to resolve any consumer complaints. BBB Accredited Businesses pay a fee for accreditation review/monitoring and for support of BBB services to the public.

BBB accreditation does not mean that the business' products or services have been evaluated or endorsed by BBB, or that BBB has made a determination as to the business' product quality or competency in performing services.

Reason for Rating

BBB rating is based on 13 factors. Get the details about the factors considered.

Factors that raised the rating for M&M Heating & Air Conditioning Service Co. include:

  • Length of time business has been operating
  • Complaint volume filed with BBB for business of this size
  • Response to 1 complaint(s) filed against business
  • Resolution of complaint(s) filed against business

Customer Complaints Summary Read complaint details

1 complaint closed with BBB in last 3 years | 0 closed in last 12 months
Complaint Type Total Closed Complaints
Advertising/Sales Issues 0
Billing/Collection Issues 1
Delivery Issues 0
Guarantee/Warranty Issues 0
Problems with Product/Service 0
Total Closed Complaints 1

Customer Reviews Summary Read customer reviews

0 Customer Reviews on M&M Heating & Air Conditioning Service Co.
Customer Experience Total Customer Reviews
Positive Experience 0
Neutral Experience 0
Negative Experience 0
Total Customer Reviews 0

Additional Information

BBB file opened: November 27, 1996 Business started: 02/01/1976 in CA Business incorporated 11/04/1994 in CA
Licensing, Bonding or Registration

This business is in an industry that may require professional licensing, bonding or registration. BBB encourages you to check with the appropriate agency to be certain any requirements are currently being met.

These agencies may include:

Contractor's State License Board
9821 Business Park Drive, Sacramento CA 95827
Phone Number: (800) 321-2752
The number is 449664.

Contractor's State License Board
9821 Business Park Drive, Sacramento CA 95827
Phone Number: (800) 321-2752
The number is 649732.

Contractor's State License Board
9821 Business Park Drive, Sacramento CA 95827
Phone Number: (800) 321-2752
The number is 647807.

Type of Entity


Business Management
Mr. Ronald Malmquist, C.E.O. Ms. Cher Grech, Office Manager Joan Malmquist, V.P.
Contact Information
Customer Contact: Ms. Cher Grech, Office Manager
Principal: Mr. Ronald Malmquist, C.E.O.
Business Category

Air conditioning & Heating Contractors - Residential Air conditioning & Heating Contractors - Commercial Contractors - Sheet Metal Air Conditioning Repair Air Duct Cleaning Air Conditioning Contractors & Systems Heating & Air Conditioning

Alternate Business Names
General Sheet Metal Heating & Air M&M Air Duct Cleaning Malmquist Mechanical, Inc.
Industry Tips
Hiring a Contractor in California: Essential Tips Stay Informed to Keep Cool: Tips for Hiring an HVAC Service

Additional Locations


BBB Customer Review Rating plus BBB Rating Overview

BBB Customer Reviews Rating represents the customers opinions of the business. The Customer Review Rating is based on the number of positive, neutral and negative customer reviews posted that are calculated to produce a score.

Customer Review Experience Value
Positive Review 5 points per review
Neutral Review 3 points per review
Negative Review 1 point per review

BBB letter grades represent the BBB's opinion of the business. The BBB grade is based on BBB file information about the business. In some cases, a business' grade may be lowered if the BBB does not have sufficient information about the business despite BBB requests for that information from the business.

BBB Letter Grade Scale

BBB Rating Value
A+ 5
A 4.66
A- 4.33
B+ 4
B 3.66
B- 3.33
C+ 3
C 2.66
C- 2.33
D+ 2
D 1.66
D- 1.33
F 1
NR -----
Star Rating scale

  Average Score
5 stars 5.00
4.5 stars 4.50-4.99
4 stars 4.00-4.49
3.5 stars 3.50-3.99
3 stars 3.00-3.49
2.5 stars 2.50-2.99
2 stars 2.00-2.49
1.5 stars 1.50-1.99
1 star 0-1.49

BBB Customer Review Rating plus BBB Rating is not a guarantee of a business' reliability or performance, and BBB recommends that consumers consider a business' BBB Rating and Customer Review Rating in addition to all other available information about the business. If the BBB Rating is NR then only Customer Reviews are used for the Star Rating.

Complaint Detail(s)

11/18/2014 Billing/Collection Issues | Read Complaint Details

Additional Notes

Complaint: On 6/6/2014 *** from M&M came out on a $89 service charge to diagnose a problem with my air conditioner. He could not figure out what was wrong, stayed longer than what was expected, and ended up charging me a total of $144 which I paid, even though they never told us in the beginning that they were charging by the hour and it could cost us more than the $89. After talking to a supervisor on the phone he then told me he would need to come back to put in a new motor that would cost $1186. He came out on 6/20/2014 to put it in. After arriving at my house and testing the system again and spending a long time on the phone talking to a supervisor, he told me that we would not need the motor after all. He then said he would like to go back into the attic to look some more at the duct work. I told Ron that he could leave and I would figure out what I would do next. He didn't fix anything or could tell us what was wrong. On 7/9/2014, I got a bill in the mail from M& M for $394.16 for extra labor, freight, and a restocking fee for the motor I never needed in the first place. On July 11th 2014, I called the office and **** told me that I was rude and ignorant which I was not. She then told me the President of the company *** would call me and we could work this out. He did call me but I wasn't home and he left a message to call back. I did call back the same day and left a message but he never has called me back to this date. On Sept 10th, I got another invoice from M@M for $462.73 which included finance charges. Since I never heard back from them after leaving my last message, I had wrongly figured that this matter was resolved. I have now called *** three times in an effort to resolve this issue including today when I left a message with **** but he has never returned any of my calls.

Desired Settlement: I desire for the original charge dated 6/24/14 and all late fees to be canceled. The diagnosis fee(for 6/6) was already paid. I shouldn't have to pay more labor charges(for 6/20) after they admitted to making a wrong diagnosis in the first place. On 6/20 they came to put the motor in, but decided it wasn't needed so we shouldn't have to pay a labor fee for that day. I also shouldn't have to pay a restocking or freight fee on a motor that I never needed in the first place.

Business Response: Business states that they are taking this complaint very seriously. The business is currently in the process of gathering all necessary documents and completing their response. Business will submit their response to the BBB within the next couple of days.

Consumer Response: I am rejecting this response because:Since we both feel we are 100 per cent right in regards to this complaint, I am willing to make a one time offer to split the original invoice of $394.16 in half and pay my share of $197.08. Please send or email me a new invoice with $197.08 due and we can finally end our dispute.

Business Response:

You are correct in stating we both feel 100% right in regards to what has actually transpired here. Our offer was in good faith and is far below our internal cost as we have lost money and time spent on this situation. Our offer was for $262.77 and your offering $197.08 which means we are now down to disputing $65.69 so how about we split the $65.69 and your portion of that would be $32.84 which would bring your balance due to $229.92. If you will accept this offer we can finalize this dispute and I will attach an invoice through this program for payment in full in the form of cashiers check or cash.