With balloons bobbing in a warm spring breeze, D.C. Councilman William R. Spaulding (D-Ward 5) stepped onto the portico of Union Wesley AME Zion Church in upper Northeast yesterday and told about 100 cheering supporters he will run for reelection in the fall.

Spaulding, speaking above the noise of rushing automobiles on nearby Michigan Avenue, said he will stand on his seven-year record in the council in seeking a third term.

With broad strokes he painted that record as full of accomplishments, and called the ward "number one" in everything from crime resistance to the arts to care for the elderly.

Spaulding named no specific issues he planned to address in the campaign. Interviewed afterward, he refused to acknowledge opposition from any other candidates, saying: "I'm not running against opposition.

"The issues," said Spaulding, "are the same as they've always been." He declined to elaborate.

Spaulding faces potentially stiff opposition in the September Democratic primary from former at-large councilman Douglas E. Moore, who has attacked Spaulding with spirited rhetoric on several fronts, and from Robert L. Artisst, who lost to Spaulding by only 311 votes in the last election.

Moore has blamed Spaulding, chairman of the council's government operations committee, for numerous foul-ups in the city's election apparatus.

Asked to what extent he would hold himself responsible for those problems, Spaulding noted yesterday that the city last week hired an Erie County, N.Y., election official to straighten out the system.

"I have every indication that we're going to have a good election in September," he said.